研究者詳細 - 片寄　正樹

論文 - 片寄　正樹

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Effects of inspiratory muscle metaboreflex on cerebral circulation at rest and during light-intensity exercise in healthy males.

Kohei Sato, Tatsuki Kamoda, Rintaro Sakamoto, Keisho Katayama, Toru Neki, Masaki Katayose, Erika Iwamoto

Respiratory physiology & neurobiology 104422 - 104422 2025年03月 [国際誌]

PURPOSE: This study aimed to clarify the effects of inspiratory muscle metaboreflex on cerebral circulation at rest and during exercise. METHODS: Twelve young males randomly completed two trials (rest and exercise [leg cycling at 40% peak oxygen uptake] trials) on separate days. In each trial, the internal carotid artery (ICA), an index of cerebral circulation, was measured using Doppler ultrasound 2min after inspiratory loading breathing (IL condition) or non-loading breathing (control condition). During ICA assessments, participants engaged in 3min of spontaneous breathing (SB), followed by 3min of isocapnic hyperventilation (IHV). RESULTS: ICA conductance was lower in the IL condition than in the control condition in both rest and exercise trials. Inspiratory mucle metaboreflex did not reduce ICA blood flow during SB but decreased it during IHV in both trials. CONCLUSION: Our findings suggest that inspiratory muscle metaboreflex could decrease cerebrovascular conductance from rest to light-intensity exercise and attenuates cerebral blood flow with increased respiratory muscle work.

DOI PubMed

Dilatory responsiveness of the internal carotid artery to shear stimulus is constant under different levels of transient hypercapnia.

Rintaro Sakamoto, Tatsuki Kamoda, Shigehiko Ogoh, Kohei Sato, Masaki Katayose, Toru Neki, Erika Iwamoto

Journal of applied physiology (Bethesda, Md. : 1985) 138 ( 2 ) 397 - 403 2025年02月 [国際誌]

Peripheral endothelial function, which accounts for the variability in shear stimulus, can be assessed using shear-mediated dilation normalized to the increased shear stimulus. Similarly, shear-mediated dilation of the internal carotid artery (ICA), an index of cerebrovascular endothelial function, should be normalized to increased shear stimulus. However, this approach has not yet been validated. Thus, the shear-mediated dilation of the ICA was assessed in 14 young adults during three levels of transient hypercapnia, induced by elevating the partial pressure of end-tidal carbon dioxide for 30 s by 6, 9, and 12 mmHg. The ICA shear rate (SR) was calculated using the ICA diameter and velocity, both measured by Doppler ultrasound. The total vasodilator stimulus was quantified as the SR area under the curve from the onset of hypercapnia to peak dilation, including and excluding baseline values [(SRAUC) and delta SRAUC (DSRAUC), respectively]. Shear-mediated dilation was calculated as the percent increase in diameter from baselines. ICA dilation was positively associated with DSRAUC [r(rm) = 0.47, P < 0.01] but not with SRAUC [r(rm) = 0.32, P = 0.09]. Consequently, ICA dilation normalized to DSRAUC did not differ among trials (main effect of rial, P = 0.77). Contrarily, the difference in ICA dilation among trials remained significant when normalized to SRAUC (main effect of trial, P = 0.02). Therefore, normalized shear-mediated dilation using DSRAUC can reduce variability associated with increased shear stimulus during ICA dilation assessment, thereby enhancing the validity of evaluating cerebrovascular endothelial function.NEW & NOTEWORTHY This study demonstrated that shear-mediated dilation of the internal carotid artery (ICA), an index of cerebrovascular endothelial function, increased with the increase of shear stimulus induced by different degrees of transient hypercapnia. However, when ICA dilation was normalized to the total increased shear stimulus above baseline, the vasodilation became comparable across different hypercapnia levels. Thus, normalizing ICA dilation to the total shear stimulus increased from baseline may enhance the validity of assessing cerebrovascular endothelial function.

DOI PubMed

Fifth Lumbar Vertebral Shape in Early-Stage Lumbar Spondylolysis: Three-Dimensional Bone Morphology Analysis Using Homologous Models

Yuji Yamane, Hajime Toda, Masaki Katayose

Spine Surgery and Related Research ( Japanese Society for Spine Surgery and Related Research ) 9 ( 1 ) 78 - 86 2025年01月

DOI

Prognostic implication of sarcopenia diagnosed by updated Asian Working Group for Sarcopenia criteria in older patients with heart failure: Utility and limitation

Satoshi Katano, Kotaro Yamano, Toshiyuki Yano, Ryo Numazawa, Ryohei Nagaoka, Suguru Honma, Yusuke Fujisawa, Yasuhiro Miki, Yuhei Takamura, Hayato Kunihara, Hiroya Fujisaki, Hidemichi Kouzu, Katsuhiko Ohori, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

The Journal of nutrition, health and aging ( Elsevier BV ) 29 ( 1 ) 100434 - 100434 2025年01月

DOI

最大等尺性肩屈曲運動時と投球動作時における肩甲骨位置の関連性

野村勇輝, 戸田創, 才崎和哉, 浅野柊, 山下泰功, 飯田尚哉, 小出所大樹, 渡部峻, 吉田昌弘, 吉田真, 山本敬三, 片寄正樹

スポーツ理学療法学 ( 一般社団法人日本スポーツ理学療法学会 ) 3 ( 1 ) 6 - 12 2025年

【目的】本研究では，最大等尺性肩屈曲運動（以下，MVIC肩屈曲）と投球動作における肩甲骨位置の関連性を明らかにすることを目的とした。【方法】大学野球選手15名を対象に，3次元動作解析装置を用いて肩甲骨位置を定量評価した。肩関節90°屈曲位でMVIC肩屈曲時の肩甲骨位置の変化量と投球動作時の足部接地（以下，FC）・肩関節最大外旋位（以下，MER）・ボールリリースにおける肩甲骨位置を計測した。MVIC肩屈曲の肩甲骨位置の変化量と投球動作時の肩甲骨位置との関連性を検討するために，ピアソンの相関係数を算出した。【結果】MVIC肩屈曲の肩甲骨内旋角度の変化量は，FC（r＝0.55, p＝0.033）とMER（r＝0.52, p＝0.047）の肩甲骨内旋角度と有意な正の相関関係を認めた。【結論】MVIC肩屈曲の肩甲骨内旋の変化量は，投球動作時の肩甲骨内旋角度を推測する評価指標として有用となる可能性がある。

DOI

Passive muscle tension changes in the biceps femoris long head after biceps femoris short head detachment: A human cadaver study.

Gakuto Nakao, Kazuma Yamagata, Risa Adachi, Koki Ishiyama, Kazuyoshi Kozawa, Kota Watanabe, Yuki Ohsaki, Kousuke Shiwaku, Norio Hayashi, Masaki Katayose, Keigo Taniguchi

Journal of biomechanics 179 112480 - 112480 2024年12月 [国際誌]

The functional role of the biceps femoris short head (BFsh) remains unclear. Clarifying the functional role of each biceps femoris head may provide useful insights into the reduction of biceps femoris long head (BFlh) injuries. This study aimed to clarify whether the passive tension in the BFlh would change with BFsh detachment using cadavers. The shear modulus of the BFlh and BFsh was measured using ultrasonic shear wave elastography as an index of passive tension in three tissue processing conditions (intact, removal of all tissues from skin to deep fascia, and BFsh detachment) in four limb positions, with hip [H0°, H90°] and knee [K0°, K90°] joint angles under each tissue processing condition. The measurement site was the distal 30 % of the line connecting the sciatic tuberosity (100 %) and fibular head (0 %). Three-way analysis of variance was conducted with muscles, tissue processing, and positions as factors, which revealed a significant interaction (P < 0.01). The post-test results indicated that the BFlh was significantly higher than the BFsh at H90° and K0° before tissue processing; however, no difference was observed between the muscles after skin and deep fascia removal. After BFsh detachment, the shear modulus of the BFsh decreased, whereas that of the BFlh significantly increased (P < 0.01), suggesting that the BFsh might be involved in the passive tension reduction of the BFlh in a lengthened position, as the shear modulus of the BFlh increased after detachment.

DOI PubMed

Effect of tasks on intramuscular regional differences in rectus femoris elasticity during isometric contraction: An ultrasound shear wave elastography study.

Taiki Kodesho, Kazuma Yamagata, Gakuto Nakao, Masaki Katayose, Keigo Taniguchi

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology 80 102967 - 102967 2024年12月 [国際誌]

PURPOSE: This study aimed to investigate intramuscular regional differences and task specificity of rectus femoris (RF) elasticity during isometric contraction. METHODS: Sixteen healthy males (aged 24.3 ± 4.1 years) participated in this study. The tasks included isometric hip flexion (HF) and knee extension (KE). The contractions were maintained at 0%, 30%, and 60% of their respective maximum voluntary isometric contraction (MVC) forces for 5 s each at 50˚ hip flexion and 90˚ knee flexion. RF elasticity was measured in two regions, proximal (33%) and distal (67%). The shear modulus (kPa), measured by shear wave elastography, was used to determine RF elasticity. RESULTS: A significant interaction effect was observed (intensity × region × task) (P = 0.01). Regarding regional differences during contraction, the proximal region exhibited a greater shear modulus than the distal region at 60% MVC in the hip flexion task (P = 0.001). Conversely, no regional differences were observed at either 30% MVC (P = 0.625) or 60% MVC (P = 0.568) in the knee extension task. DISCUSSION: Muscle shear modulus during contraction reflects active force, suggesting that mechanical stress can be applied primarily to the proximal region of the RF during the HF task.

DOI PubMed

大腿二頭筋短頭の剥離に伴う大腿二頭筋長頭の受動張力変化

中尾学人, 谷口圭吾, 山形一真, 足立梨紗, 石山輝希, 小澤和祥, 渡邉耕太, 大崎雄樹, 林典雄, 塩泡孝介, 片寄正樹, 金谷耕平

日本整形外科超音波学会学術集会プログラム・抄録集 ( (一社)日本整形外科超音波学会 ) 35回 119 - 119 2024年10月

超音波研究から生まれた新しい理学療法技術超音波研究が切り拓く力学ストレス評価の可能性

谷口圭吾, 中尾学人, 小出所大樹, 加藤拓也, 飯田尚哉, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( (一社)日本整形外科超音波学会 ) 35回 47 - 47 2024年10月

女性アスリート支援ネットワーク構築への取り組み北海道スポーツ医科学コンソーシアムにおける女性アスリートへの健康支援活動

寒川美奈, 蜂谷愛, 笠師久美子, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 32 ( 4 ) S137 - S137 2024年10月

大腿二頭筋長頭の力学的特性弾性部位差と伸長速度間の応力差

中尾学人, 山形一真, 足立梨紗, 石山輝希, 小澤和祥, 小出所大樹, 渡邉耕太, 大崎雄樹, 片寄正樹, 谷口圭吾

体力科学 ( (一社)日本体力医学会 ) 73 ( 4 ) 179 - 179 2024年08月

Relationship between glenohumeral horizontal abduction angle and scapular internal rotation angle at maximum shoulder external rotation during baseball pitching

Yuki Nomura, Hajime Toda, Masaki Katayose, Shun Watanabe, Masahiro Yoshida, Makoto Yoshida, Keizo Yamamoto

JSES International ( Elsevier BV ) 2024年08月

DOI

Validity of Elastic Imaging Evaluation of Hamstring Muscles With Knee Contracture Using Ultrasound Shear Wave Elastography.

Gakuto Nakao, Taiki Kodesho, Kazuma Yamagata, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

Cureus 16 ( 8 ) e68343 2024年08月 [国際誌]

PURPOSE: This study used ultrasound shear wave elastography (SWE) to evaluate the mechanical properties of hamstring muscles from cadaveric specimens with knee flexion contractures. METHODS: Hamstring muscles for tensile testing were harvested from Thiel soft-embalmed cadavers with and without knee flexion contracture. Muscle specimens were mounted on a testing machine. The initial load detected when a tensile load was applied to the distal end was used as the slack length. The cross-sectional areas of the muscle at slack length were measured at the proximal and distal sites using B-mode ultrasonography. Subsequently, the muscle specimen was elongated from the slack length to 8% strain, with the shear modulus measured using SWE. Young's modulus (stress/strain) was calculated based on the displacement and tensile force obtained from the tensile test. RESULTS: Regression analysis showed a significant positive linear relationship between the Young's and shear moduli for all specimens at all the sites (P < 0.01 and coefficient of determination: 0.95-0.99). The Young's and average shear moduli at the proximal and distal sites were higher in all hamstring muscles with contractures than in those without contractures. CONCLUSIONS: SWE can be used to estimate Young's moduli of hamstring muscles with contractures. Muscle specimens with contractures exhibited higher resistance to elongation, thereby indicating that their mechanical properties differed from those of muscles without contractures.

DOI PubMed

大腿二頭筋長頭の力学的特性弾性部位差と伸長速度間の応力差

中尾学人, 山形一真, 足立梨紗, 石山輝希, 小澤和祥, 小出所大樹, 渡邉耕太, 大崎雄樹, 片寄正樹, 谷口圭吾

体力科学 ( (一社)日本体力医学会 ) 73 ( 4 ) 179 - 179 2024年08月

Associations between in‐hospital daily protein intake and adverse clinical outcomes in older patients with heart failure

Satoshi Katano, Toshiyuki Yano, Kotaro Yamano, Ryo Numazawa, Ryohei Nagaoka, Suguru Honma, Yusuke Fujisawa, Katsuhiko Ohori, Hidemichi Kouzu, Hayato Kunihara, Hiroya Fujisaki, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

ESC Heart Failure ( Wiley ) 2024年05月

Abstract Aims The adverse effects of low daily protein intake (DPI) on clinical outcomes in patients with heart failure (HF) are known; however, an optimal DPI to predict event adverse outcomes remains undetermined. Moreover, whether protein restriction therapy for chronic kidney disease is applicable in patients with HF and renal dysfunction remains unclear. Methods and results In this single‐centre, ambispective cohort study, we included 405 patients with HF aged ≥65 years (mean age, 78.6 ± 7.5 years; 50% women). DPI was estimated from consumption over three consecutive days before discharge and normalized relative to the ideal body weight [IBW, 22 kg/m² × height (m)²]. The primary outcome was a composite of all‐cause mortality and HF‐related readmission within the 2 year post‐discharge period. Results During an average follow‐up period of 1.49 ± 0.74 years, 100 patients experienced composite events. Kaplan–Meier survival curves revealed a significantly lower composite event‐free rate in patients within the lowest quartile of DPI than in the upper quartiles (log‐rank test, P = 0.02). A multivariate Cox proportional hazards analysis after adjusting for established prognostic markers and non‐proteogenic energy intake revealed that patients in the lowest DPI quartile faced a two‐fold higher risk of composite events than those in the highest quartile [hazard ratio (HR), 2.03; 95% confidence interval (CI), 1.08–3.82; P = 0.03]. The composite event risk linearly increased as DPI decreased (P for nonlinearity = 0.90), with each standard deviation (0.26 g/kg IBW/day) decrease in DPI associated with a 32% increase in composite event risk (HR, 1.32; 95% CI, 1.10–1.71; P = 0.04). There was significant heterogeneity in the effect of DPI, with the possible disadvantage of lower DPI in patients with HF with cystatin C‐based estimated glomerular filtration rate <30 mL/min/1.73 m². The cutoff value of DPI for predicting the occurrence of composite events calculated from the Youden index was 1.12 g/kg IBW/day. Incorporating a DPI < 1.12 g/kg IBW/day into the baseline model significantly improved the prediction of post‐discharge composite events (continuous net reclassification improvement, 0.294; 95% CI, 0.072–0.516; P = 0.01). Conclusions Lower DPI during hospitalization is associated with an increased risk of mortality and HF readmission independent of non‐proteogenic energy intake, and the possible optimal DPI for predicting adverse clinical outcomes is >1.12 g/kg IBW/day in older patients with HF. Caution is warranted when protein restriction therapy is administered to older patients with HF and renal dysfunction.

DOI

Stress–strain relationship of individual hamstring muscles: A human cadaver study

Gakuto Nakao, Taiki Kodesho, Kazuma Yamagata, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

Journal of the Mechanical Behavior of Biomedical Materials ( Elsevier BV ) 153 106473 - 106473 2024年05月

DOI

Correction: Relationship between shear elastic modulus and passive muscle force in human hamstring muscles using a Thiel soft-embalmed cadaver.

Gakuto Nakao, Taiki Kodesho, Takuya Kato, Yu Yokoyama, Yuhei Saito, Yuki Ohsaki, Kota Watanabe, Masaki Katayose, Keigo Taniguchi

Journal of medical ultrasonics (2001) 2024年03月 [国内誌]

DOI PubMed

Acute aerobic exercise enhances cerebrovascular shear-mediated dilation in young adults: the role of cerebral shear.

Rintaro Sakamoto, Tatsuki Kamoda, Kohei Sato, Shigehiko Ogoh, Masaki Katayose, Toru Neki, Erika Iwamoto

Journal of applied physiology (Bethesda, Md. : 1985) 136 ( 3 ) 535 - 548 2024年03月 [国際誌]

Exercise-induced increases in shear rate (SR) acutely improve peripheral endothelial function, but the presence of this mechanism in cerebral arteries remains unclear. Thus, we evaluated shear-mediated dilation of the internal carotid artery (ICA), which is an index of cerebrovascular endothelial function, before and after exercise. Shear-mediated dilation was measured with 30 s of hypercapnia in 16 young adults before and 10 min after 30 min of sitting rest (CON) or three cycling exercises on four separate days. The target exercise intensity was 80% of oxygen uptake at the ventilatory threshold. To manipulate the ICA SR during exercise, participants breathed spontaneously (ExSB, SR increase) or hyperventilated without (ExHV, no increase in SR) or with ([Formula: see text], restoration of SR increase) addition of CO2 to inspiratory air. Shear-mediated dilation was calculated as a percent increase in diameter from baseline. Doppler ultrasound measures ICA velocity and diameter. The CON trial revealed that 30 min of sitting did not alter shear-mediated dilation (4.34 ± 1.37% to 3.44 ± 1.23%, P = 0.052). ICA dilation after exercise compared with preexercise levels increased in the ExSB trial (3.32 ± 1.37% to 4.74 ± 1.84%, P < 0.01), remained unchanged in the ExHV trial (4.07 ± 1.55% to 3.21 ± 1.48%, P = 0.07), but was elevated in the [Formula: see text] trial (3.35 ± 1.15% to 4.33 ± 2.12%, P = 0.04). Our results indicate that exercise-induced increases in cerebral shear may play a crucial role in improving cerebrovascular endothelial function after acute exercise in young adults.NEW & NOTEWORTHY We found that 30-min cycling (target intensity was 80% of the ventilatory threshold) with increasing shear of the internal carotid artery (ICA) enhanced transient hypercapnia-induced shear-mediated dilation of the ICA, reflecting improved cerebrovascular endothelial function. This enhancement of ICA dilation was diminished by suppressing the exercise-induced increase in ICA shear via hyperventilation. Our results indicate that increases in cerebral shear may be a key stimulus for improving cerebrovascular endothelial function after exercise in young adults.

DOI PubMed

せん断波イメージングを用いた筋の粘弾性評価静的ストレッチングの効果検証と関節可動性との関係

小出所大樹, 谷口圭吾, 中尾学人, 山形一真, 渡邉耕太, 片寄正樹, 寺本篤史

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 98 ( 3 ) S1359 - S1359 2024年03月

ハムストリングスの局所的な力学特性 Thiel法固定献体を用いた検討

中尾学人, 谷口圭吾, 小出所大樹, 山形一真, 渡邉耕太, 大崎雄樹, 片寄正樹, 寺本篤史

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 98 ( 3 ) S1379 - S1379 2024年03月

筋疲労状態におけるハムストリングス筋内の神経筋活動分布

青木信裕, 奥山恵伍, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 31 ( 4 ) S305 - S305 2023年10月

最大等尺性肩水平外転運動時の肩甲骨角度変化量と投球動作時の肩甲骨角度との関連性

山田由菜, 野村勇輝, 戸田創, 才崎和哉, 浅野柊, 山下泰功, 飯田尚哉, 小出所大樹, 渡部峻, 吉田昌弘, 吉田真, 山本敬三, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 31 ( 4 ) S211 - S211 2023年10月

Optimal serum 25-hydroxyvitamin D level to prevent sarcopenia in patients with heart failure: insights from a dose-response relationship

Ryohei Nagaoka, Satoshi Katano, Toshiyuki Yano, Ryo Numazawa, Kotaro Yamano, Yusuke Fujisawa, Suguru Honma, Tatsuki Kamoda, Kohei Sato, Hidemichi Kouzu, Katsuhiko Ohori, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

Nutrition, Metabolism and Cardiovascular Diseases ( Elsevier BV ) 2023年10月

DOI

ノルディックハムストリングにおけるハムストリングスの筋活動中心動態

奥山恵伍, 青木信裕, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 31 ( 4 ) S221 - S221 2023年10月

Circulating level of β-aminoisobutyric acid (BAIBA), a novel myokine-like molecule, is inversely associated with fat mass in patients with heart failure

Satoshi Katano, Toshiyuki Yano, Hidemichi Kouzu, Ryohei Nagaoka, Ryo Numazawa, Kotaro Yamano, Yusuke Fujisawa, Katsuhiko Ohori, Nobutaka Nagano, Takefumi Fujito, Ryo Nishikawa, Wataru Ohwada, Masaki Katayose, Tatsuya Sato, Atsushi Kuno, Masato Furuhashi

Heart and Vessels ( Springer Science and Business Media LLC ) 2023年09月

DOI

Development and validation of osteoporosis risk assessment score, ORAS, in heart failure patients: comparison with the Osteoporosis Self-Assessment Tool for Asians (OSTA)

Ryo Numazawa, Satoshi Katano, Toshiyuki Yano, Masayuki Koyama, Ryohei Nagaoka, Yusuke Fujisawa, Kotaro Yamano, Suguru Honma, Katsuhiko Ohori, Hidemichi Kouzu, Masaki Katayose, Masato Furuhashi, Kazufumi Tsuchihashi, Akiyoshi Hashimoto

European Journal of Cardiovascular Nursing ( Oxford University Press (OUP) ) 2023年08月

Abstract Aim Osteoporosis is prevalent and is associated with poor prognosis in heart failure (HF) patients. However, bone mineral density (BMD) measurement by a dual-energy X-ray absorptiometry (DEXA) scan is not always available in a daily clinical setting and large-scale population-based studies. Methods A single-center, cross-sectional observational study was conducted with 387 patients (median age: 77 years [interquartile range: 68 to 83 years]; 37% women). BMDs were measured by DEXA scans, and osteoporosis was diagnosed as ≤ -2.5 standard deviation of the BMDs in healthy young adults. Osteoporosis risk assessment score (ORAS) was developed using significant predictors from a logistic regression model for osteoporosis and was subsequently validated. Results Osteoporosis was found in 103 (27%) of the 387 HF patients. Multivariate logistic regression analyses yielded the ORAS based on sex, BMI, handgrip strength, and anti-coagulant therapy utilization. The C-index of ORAS in the developmental set (0.796, 95% confidence interval: 0.747 to 0.845) was similar to the bootstrap validation of the prediction model (0.784), and tended to be higher than that of the Osteoporosis Self-Assessment Tool for Asians (OSTA). A nomogram of ORAS, established on the basis of the final logistic regression model, demonstrated 100% sensitivity at the lowest score (35 points), with an optimal cutoff point of 127 points, yielding 85% sensitivity and 62% specificity. Conclusions ORAS exhibits superior predictive performance to OSTA in predicting osteoporosis in HF patients, establishing itself as a valuable tool for early detection in both daily clinical practice and large-scale population-based studies.

DOI

ハムストリングス各筋の応力-歪み関係 Thiel法固定献体を用いた検討

中尾学人, 谷口圭吾, 小出所大樹, 山形一真, 渡邉耕太, 大崎雄樹, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 97 ( 8 ) S1901 - S1901 2023年08月

静的な股関節外転ストレッチングが股関節内転筋群の筋スティフネスに及ぼす急性効果せん断波エラストグラフィを用いた検討

加藤拓也, 谷口圭吾, 小出所大樹, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 31 ( 3 ) 467 - 475 2023年08月

(背景)股関節外転ストレッチングにより股関節外転可動域の改善が報告されているものの,股関節内転筋群の柔軟性に及ぼす効果は明らかとされていない.本研究は股関節外転による静的ストレッチングが内転筋群の柔軟性に及ぼす影響を解明することを目的とした.(方法)対象は健常成人男性12名(24.0±3.8歳)とした.外転ストレッチングは,股屈曲0°および膝屈曲90°における最大股関節外転位にて1分×5セット実施し,セット間で10秒の休息を設けた.被検筋は長内転筋,大内転筋および薄筋とし筋柔軟性の指標としてせん断弾性率(kPa)をせん断波エラストグラフィ超音波診断装置にて定量した.ストレッチングの介入前後に最大股関節外転角度および外転0°から40°まで10°毎のせん断弾性率を各筋で計測した.(結果)介入後の最大外転角度(47.9°)は介入前(45.1°)と比較して有意に増加した(P<0.01,+6.0%).せん断弾性率は2次の交互作用を認め,介入後に長内転筋のみ外転30°にて8.9%(-1.3kPa),外転40°にて19.9%(-5.0kPa)有意に低下した(P<0.01).一方,大内転筋および薄筋は交互作用および時間の主効果を認めなかった.(考察)股屈曲0°および膝屈曲90°位での股関節外転ストレッチングは,最大外転角度を増大させ,長内転筋の柔軟性を改善させる一方,薄筋および大内転筋には影響を与えないことが示された.(著者抄録)

Skipping breakfast does not accelerate the hyperglycemia-induced endothelial dysfunction but reduces blood flow of the brachial artery in young men.

Tatsuki Kamoda, Rintaro Sakamoto, Masaki Katayose, Saki Yamamoto, Toru Neki, Kohei Sato, Erika Iwamoto

European journal of applied physiology 2023年07月 [国際誌]

PURPOSE: Postprandial hyperglycemia is assumed to have a negative impact on flow-mediated dilation (FMD), an index of endothelial function, and blood flow of the peripheral conduit arteries. This study aimed to determine whether the enhancement of postprandial hyperglycemia by skipping breakfast accelerates endothelial dysfunction and reduces the blood flow in the brachial artery in young men. METHODS: Using a randomized cross-over design, ten healthy men completed two trials: with and without breakfast (Eating and Fasting trials, respectively). Venous blood sampling and brachial FMD tests were conducted before, 30, 60, 90, and 120 min after a 75-g oral glucose tolerance test (OGTT). RESULTS: Skipping breakfast boosted post-OGTT glucose levels than having breakfast (P = 0.01). The magnitude of the decrease in FMD via OGTT did not vary between trials (main effect of trial P = 0.55). Although brachial blood flow tended to decrease after OGTT in both trials (interaction and main effect of time P = 0.61 and P = 0.054, respectively), the decrease in blood flow following OGTT was greater in the Fasting trial than in the Eating trial (main effect of trial, mean difference = - 15.8 mL/min [95%CI = - 25.6 to - 6.0 mL/min], P < 0.01). CONCLUSION: Skipping breakfast did not enhance the magnitude of the decrease in FMD following glucose loading, but did accelerate hyperglycemia-induced reduction in brachial blood flow. Current findings suggest that even missing one breakfast has negative impacts on the blood flow regulation of the peripheral conduit arteries in young men who habitually eat breakfast.

DOI PubMed

大腿四頭筋セッティングの収縮強度漸増課題における筋厚と筋弾性の関係

河合誠, 小出所大樹, 時田諒, 山形一真, 青木昌弘, 寺本篤史, 金谷耕平, 片寄正樹, 谷口圭吾

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 34回 152 - 152 2023年07月

屈曲拘縮膝におけるハムストリングスの弾性画像評価の妥当性

中尾学人, 谷口圭吾, 小出所大樹, 山形一真, 渡邉耕太, 大崎雄樹, 片寄正樹, 金谷耕平

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 34回 135 - 135 2023年07月

Impact of Radar Chart-Based Information Sharing in a Multidisciplinary Team on In-Hospital Outcomes and Prognosis in Older Patients With Heart Failure

Satoshi Katano, Toshiyuki Yano, Ryo Numazawa, Ryohei Nagaoka, Kotaro Yamano, Yusuke Fujisawa, Suguru Honma, Ayako Watanabe, Katsuhiko Ohori, Hidemichi Kouzu, Takefumi Fujito, Tomoyuki Ishigo, Hayato Kunihara, Hiroya Fujisaki, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

Circulation Reports ( Japanese Circulation Society ) 2023年06月

DOI

Quantifying the shear modulus of the adductor longus muscle during hip joint motion using shear wave elastography.

Takuya Kato, Keigo Taniguchi, Taiki Kodesho, Gakuto Nakao, Yu Yokoyama, Yuhei Saito, Masaki Katayose

Scientific reports 13 ( 1 ) 9510 - 9510 2023年06月 [国際誌]

The present study aims to assess the effect of the hip flexion angle on the shear modulus of the adductor longus (AL) muscle associated with passive hip abduction and rotation. Sixteen men participated in the study. For the hip abduction task, the hip flexion angles used were - 20, 0, 20, 40, 60, and 80°, and the hip abduction angles were 0, 10, 20, 30, and 40°. For the hip rotation task, the hip flexion angles used were - 20, 0, 20, 40, 60, and 80°, hip abduction angles were 0 and 40°, and hip rotation angles were 20° internal rotation, 0° rotation, and 20° external rotation. The shear modulus at 20° extension was significantly higher than that at 80° flexion for the 10, 20, 30 and 40° hip abduction (i.e., P < 0.05). The shear modulus at 20° internal rotation and 20° extension was significantly higher than that at 0° rotation and 20° external rotation, regardless of the hip abduction angle (i.e., P < 0.05). The mechanical stress of the AL muscle associated with hip abduction was higher in the extended position. Furthermore, the mechanical stress could increase with internal rotation only at the hip-extended position.

DOI PubMed

Relationship between shear elastic modulus and passive muscle force in human hamstring muscles using a Thiel soft-embalmed cadaver.

Gakuto Nakao, Taiki Kodesho, Takuya Kato, Yu Yokoyama, Yuhei Saito, Yuki Ohsaki, Kota Watanabe, Masaki Katayose, Keigo Taniguchi

Journal of medical ultrasonics (2001) 50 ( 3 ) 275 - 283 2023年05月 [国内誌]

PURPOSE: Assessing muscle flexibility and architecture is important for hamstring strain injury (HSI) prevention. We investigated the relationship between shear modulus and passive force in hamstring muscles at different sites and the effect of muscle architecture on the slope of the shear modulus-passive force using shear wave elastography (SWE). METHODS: The biceps femoris long head (BFlh), semitendinosus (ST), and semimembranosus (SM) muscles were dissected from nine Thiel-embalmed cadavers and fixed to a custom-made mechanical testing machine. Calibrated weights (0-1800 g) were applied gradually in 150-g increments. The shear modulus and anatomical cross-sectional area (ACSA) were measured at proximal, central, and distal points using SWE. The muscle mass and length were measured before the loading test. The shear modulus-passive load relationship of each tested muscle region was analyzed by fitting a least-squares regression line. The increase in shear modulus slope per unit load was calculated and compared between the muscles before and after normalization by the muscle mass, length, and ACSA. RESULTS: The shear modulus and passive force for all hamstring muscles in each region showed a statistically significant linear correlation. Furthermore, the increase in shear modulus slope was greater for BFlh and ST than for SM (P < 0.05), but after normalization by the muscle length and ACSA, there were no significant differences among the muscles. CONCLUSION: The local mechanical properties of individual hamstring muscles can be indirectly estimated using SWE, and the slope of increase in shear modulus reflects characteristics of the muscle architecture.

DOI PubMed

運動器リハビリ領域におけるSUPERSONIC MACH 30の応用可能性

谷口圭吾, 小出所大樹, 石井宏, 中尾学人, 山形一真, 渡邉耕太, 片寄正樹

映像情報Medical ( 産業開発機構(株) ) 55 ( 6 ) 97 - 102 2023年05月

運動器リハビリ領域におけるSUPERSONIC MACH 30の応用可能性

谷口圭吾, 小出所大樹, 石井宏, 中尾学人, 山形一真, 渡邉耕太, 片寄正樹

映像情報Medical ( 産業開発機構(株) ) 55 ( 6 ) 97 - 102 2023年05月

Three-dimensional morphological variations in the calcaneus and talus in relation to the hallux valgus angle.

Shuhei Nozaki, Kota Watanabe, Masaki Katayose, Kenta Yamatsu, Atsushi Teramoto, Naomichi Ogihara

Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft 247 152053 - 152053 2023年04月 [国際誌]

BACKGROUND: The present study aimed to clarify the morphological patterns of the calcaneus and talus that are associated with hallux valgus angle (HVA) by quantifying the differences in the hindfoot bone morphology between left and right sides in HV patients with clear bilateral difference of HVA. METHODS: Three-dimensional (3D) computed tomography scans of 32 feet of 16 patients with HV who had right-to-left HVA differences of more than 5 degrees (68.8 ± 8.6 years) were enrolled, and 3D surface models of the calcaneus and talus were generated. A total of 556 and 430 landmarks were placed on the calcaneal and talar surfaces, respectively, to calculate the principal components (PCs) of shape variations. The PC scores were compared between the small and large HVA sides within an individual. RESULTS: The calcaneus in patients with a larger HVA (mean, 43.2 degrees) possessed slender calcaneal tuberosity, more medially oriented posterior articular surface in the coronal plane, and narrower and more concave anterior-middle articular surfaces compared to those with a small HVA (mean, 33.7 degrees). The talus with a larger HVA exhibited more medially oriented talar head in the transverse plane and more anteriorly protruded lateral region of the talar head compared to the small HVA. CONCLUSIONS: The morphological patterns of the calcaneus in patients with a larger HVA allows the hindfoot bones to easily rotate in the everting direction, while those of the talus could induce a larger internal rotation of the first metatarsal. These morphological patterns of the calcaneus and talus could be structural factors affecting the HV.

DOI PubMed

足関節角度および静的ストレッチングが腓腹筋内側頭の弾性と粘性に及ぼす影響

小出所大樹, 山形一真, 中尾学人, 山越芳樹, 片寄正樹, 谷口圭吾

超音波医学 ( (公社)日本超音波医学会 ) 50 ( Suppl. ) S699 - S699 2023年04月

大腿四頭筋セッティング時の膝窩圧迫力と大腿四頭筋弾性の関係

小出所大樹, 河合誠, 金谷耕平, 片寄正樹, 谷口圭吾

日本整形外科超音波学会会誌 ( 日本整形外科超音波学会 ) 33 ( 1 ) 72 - 79 2023年03月

【目的】大腿四頭筋セッティング時の運動強度と筋弾性率の関係を明らかにすることである.【方法】若年健常男性10名を対象に,長座位で大腿四頭筋セッティングを膝窩圧迫力を基準に0%から25%ずつ漸増させ100%まで実施した.筋弾性率(kPa)は超音波せん断波エラストグラフィにて測定した.【結果】弾性率は強度と筋の交互作用を認めた(P<0.001).多重比較の結果,安静時および50%時で筋間に有意な差はないが,25%で中間広筋(16.6±4.0)が大腿直筋(8.9±4.4)に比して高い弾性率であった.また,75%,100%で内側広筋が大腿直筋に比して高い弾性率であった(100%:60.2±17.2vs35.4±15.4,p<0.05).【考察】収縮時弾性は活動張力を反映するため,大腿四頭筋セッティングは低強度において中間広筋が,高強度では内側広筋が大腿四頭筋の発揮筋力に最も貢献している可能性がある.(著者抄録)

Effects of superficial tissue and intermuscular connections on rectus femoris muscle shear modulus heterogeneity.

Taiki Kodesho, Takuya Kato, Gakuto Nakao, Yu Yokoyama, Yuhei Saito, Kota Watanabe, Yuki Ohsaki, Masaki Katayose, Keigo Taniguchi

Journal of ultrasound 2023年02月 [国際誌]

INTRODUCTION: Intramuscular heterogeneity exists in the shear modulus of the rectus femoris (RF) muscle. However, the underlying heterogeneity mechanisms are not entirely understood. Previous research has reported that detachment of superficial tissues reduces the shear modulus by 50%. The aim of this study was to examine the effects of the skin, deep fascia, and intermuscular connections on the shear modulus of the RF at multiple sites. MATERIALS AND METHODS: Eleven donors were fixed using the Thiel method. Measurements were performed at 0°, 60°, and 120° knee flexion in a neutral hip position. Tissue processing was performed under four conditions: superficial tissue (CONT), skin off (SKIN), deep fascia detachment (FASC), and intermuscular connections detachment (ALL). The shear modulus at the proximal, central, and distal regions were measured using ultrasound shear wave elastography. The study was approved by the Sapporo Medical University Ethical Committee. RESULTS: Three-way ANOVA revealed no significant interaction between treatment, site, and angle (P = 0.156), treatment and angle (P = 0.067), or site and angle (P = 0.441). There was a significant effect of treatment (P < 0.001), site (P = 0.010), and angle (P < 0.001) and interaction between treatment and site (P < 0.001). The proximal shear modulus was greater than the central for CONT. There were no significant differences between the measurement sites for SKIN. The distal shear modulus was greater than the proximal for FASC. The distal shear modulus was also greater than the proximal and central for ALL. CONCLUSIONS: Intramuscular regional differences that influence superficial tissue and intermuscular connections of RF elasticity heterogeneity were observed.

DOI PubMed

アキレス腱術後感染により皮膚・腱欠損を生じた症例に運動器エコーを用いた動態評価と理学療法を行い、スポーツ復帰した一例

河合誠, 小出所大樹, 山田由奈, 片寄正樹, 渡邉耕太, 千葉充将, 村橋靖崇, 寺本篤史, 山下敏彦, 谷口圭吾

北海道整形災害外科学会雑誌 ( 北海道整形災害外科学会 ) 65 ( 142nd suppl ) 85 - 85 2023年

アキレス腱術後感染により皮膚・腱欠損を生じた症例に運動器エコーを用いた動態評価と理学療法を行い、スポーツ復帰した一例

河合誠, 小出所大樹, 山田由奈, 片寄正樹, 渡邉耕太, 千葉充将, 村橋靖崇, 寺本篤史, 山下敏彦, 谷口圭吾

北海道整形災害外科学会雑誌 ( 北海道整形災害外科学会 ) 65 ( 142nd suppl ) 85 - 85 2023年

Elevated circulating level of β-aminoisobutyric acid (BAIBA) in heart failure patients with type 2 diabetes receiving sodium-glucose cotransporter 2 inhibitors

Cardiovascular Diabetology ( Springer Science and Business Media LLC ) 21 ( 1 ) 285 - 285 2022年12月 [国際誌]

Abstract Aims The mechanism by which a sodium-glucose cotransporter inhibitor (SGLT2i) induces favorable effects on diabetes and cardiovascular diseases including heart failure (HF) remains poorly understood. Metabolomics including amino acid profiling enables detection of alterations in whole body metabolism. The aim of this study was to determine whether plasma amino acid profiles are modulated by SGLT2i use in HF patients with type 2 diabetes mellitus (T2DM). Methods We retrospectively examined 81 HF patients with T2DM (68 ± 11 years old; 78% male). Plasma amino acid concentrations in a fasting state after stabilization of HF were determined using ultraperformance liquid chromatography. To minimize potential selection bias in the retrospective analyses, the differences in baseline characteristics between patients receiving an SGLT2i and patients not receiving an SGLT2i were controlled by using an inverse probability of treatment weighting (IPTW)-adjusted analysis. Results Of amino acids measurable in the present assay, plasma β-aminoisobutyric acid (BAIBA), an exercise-induced myokine-like molecule also known as 3-aminoisobutyric acid or 3-amino-2-methyproponic acid, was detected in 77% of all patients and the proportion of patients in whom plasma BAIBA was detected was significantly higher in patients receiving an SGLT2i than in patients not receiving an SGLT2i (93% vs. 67%, p = 0.01). Analyses in patients in whom plasma BAIBA was detected showed that plasma BAIBA concentration was significantly higher in patients receiving an SGLT2i than in patients not receiving an SGLT2i (6.76 ± 4.72 vs. 4.56 ± 2.93 nmol/ml, p = 0.03). In multivariate logistic regression analyses that were adjusted for age and sex, SGLT2i use was independently associated with BAIBA detection. The independent association between BAIBA and SGLT2i use remained after inclusion of body mass index, HF with reduced ejection fraction, ischemic etiology, renal function, NT-proBNP, albumin, hemoglobin, and HbA1c into the Cox proportional hazards model. When the differences in baseline characteristics between patients receiving an SGLT2i and patients not receiving an SGLT2i were controlled by using an IPTW-adjusted analysis, least squares mean of plasma BAIBA concentration was significantly higher in patients receiving an SGLT2i than in patients not receiving an SGLT2i. Conclusion SGLT2i use is closely associated with increased circulating BAIBA concentration in HF patients with T2DM.

DOI PubMed

Loss of perceived social role, an index of social frailty, is an independent predictor of future adverse events in hospitalized patients with heart failure

Ayako Watanabe, Satoshi Katano, Toshiyuki Yano, Ryohei Nagaoka, Ryo Numazawa, Suguru Honma, Kotaro Yamano, Yusuke Fujisawa, Katsuhiko Ohori, Hidemichi Kouzu, Tomoyuki Ishigo, Masaki Katayose, Akiyoshi Hashimoto, Masato Furuhashi

Frontiers in Cardiovascular Medicine ( Frontiers Media SA ) 9 1051570 - 1051570 2022年12月 [国際誌]

Aims Although the impact of physical frailty on prognosis and the effect of cardiac rehabilitation in HF patients has been well established, data for the prognostic impact of social frailty (SF) in HF patients are limited. In addition, the relative importance of each SF domain in clinical outcomes remains unclear. We aimed to get a new insight into the associations of SF with clinical outcomes in elderly hospitalized HF patients. Methods A single-center, retrospective cohort study was conducted using data from 310 in-hospital HF patients aged ≥ 65 years (mean age of 78 ± 8 years; 49% women). Makizako’s five questions, a self-reported questionnaire, were used to define SF. The primary outcome was composite events defined by all-cause death and cardiovascular events. Results Of the 310 elderly HF patients, 188 patients (61%) had SF. Seventy-five patients (24%) had composite events during a mean follow-up period of 1.93 ± 0.91 years. Kaplan-Meier curves showed that patients with SF had a significantly higher composite event rate than patients without SF. In multivariate Cox regression analyses, SF was independently associated with a higher composite event rate after adjusting for prognostic markers [adjusted hazard ratio (HR), 2.01; 95% confidence interval (CI), 1.07–3.78; p = 0.04]. Of the 5 questions for defining SF, an answer of yes to the question about not feeling helpful toward friends or family, which indicates loss of perceived social role, was an independent predictor of composite events (adjusted HR, 2.28; 95% CI, 1.36–3.82; p < 0.01). Inclusion of loss of perceived social role into the baseline prognostic model improved both the continuous net reclassification improvement (0.562; 95% CI, 0.298–0.827; p < 0.01) and integrated discrimination improvement (0.031; 95% CI, 0.006–0.056; p = 0.02). Conclusion Loss of perceived social role is associated with increased adverse event risk and provides additive prognostic information in elderly HF patients.

DOI PubMed

Dynamic resistance exercise-induced pressor response does not alter hypercapnia-induced cerebral vasodilation in young adults.

Rintaro Sakamoto, Kohei Sato, Shigehiko Ogoh, Tatsuki Kamoda, Toru Neki, Masaki Katayose, Erika Iwamoto

European journal of applied physiology 123 ( 4 ) 781 - 796 2022年12月 [国際誌]

Excessive arterial pressure elevation induced by resistance exercise (RE) attenuates peripheral vasodilatory function, but its effect on cerebrovascular function is unknown. We aimed to evaluate the effect of different pressor responses to RE on hypercapnia-induced vasodilation of the internal carotid artery (ICA), an index of cerebrovascular function. To manipulate pressor responses to RE, 15 healthy young adults (11M/4F) performed two RE: high intensity with low repetitions (HL) and low intensity with high repetitions (LH) dynamic knee extension. ICA dilation, induced by 3 min of hypercapnia, was measured before and 10 min after RE using Doppler ultrasound. HL exercise elicited a greater pressor response than LH exercise. In relaxation phases of RE, ICA blood velocity increased in both HL and LH trials. However, ICA shear rate did not significantly increase in either trial (P = 0.06). Consequently, neither exercise altered post-exercise hypercapnia-induced ICA dilation (HL, 3.9 ± 1.9% to 5.1 ± 1.7%; LH, 4.6 ± 1.4% to 4.8 ± 1.8%; P > 0.05 for all). When viewed individually, the changes in ICA shear rate were positively correlated with changes in end-tidal partial pressure of carbon dioxide (PETCO2) (r = 0.46, P < 0.01) than with mean arterial pressure (r = 0.32, P = 0.02). These findings suggest that the effects of RE-induced pressor response on cerebrovascular function may be different from peripheral arteries. An increase in PETCO2 during the relaxation phase may play a more crucial role than elevated pressure in increasing cerebral shear during dynamic RE.

DOI PubMed

初期腰椎分離症における第5腰椎の形状はスポーツ動作特性によって異なるのか?-相同モデルを用いた三次元解析

山根裕司, 戸田創, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 4 ) S295 - S295 2022年10月

ハムストリングス各筋における弾性増加率と筋重量および筋横断面積の関係

中尾学人, 谷口圭吾, 加藤拓也, 小出所大樹, 斎藤佑平, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 4 ) S257 - S257 2022年10月

股関節外転ストレッチングが股関節内転筋群の柔軟性に及ぼす影響剪断波エラストグラフィを用いた検討

加藤拓也, 谷口圭吾, 小出所大樹, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 4 ) S336 - S336 2022年10月

異なる股関節屈曲角度における股関節外転ストレッチングが長内転筋の筋スティフネスに与える影響

齋藤佑平, 加藤拓也, 小出所大樹, 中尾学人, 谷口圭吾, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 4 ) S236 - S236 2022年10月

最大等尺性肩屈曲運動時と投球動作時における肩甲骨位置の関連性

野村勇輝, 戸田創, 才崎和哉, 浅野柊, 山下泰功, 飯田尚哉, 小出所大樹, 渡部峻, 吉田昌弘, 吉田真, 山本敬三, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 4 ) S234 - S234 2022年10月

Anthropometric parameters‐derived estimation of muscle mass predicts all‐cause mortality in heart failure patients

Satoshi Katano, Suguru Honma, Ryohei Nagaoka, Ryo Numazawa, Kotaro Yamano, Yusuke Fujisawa, Katsuhiko Ohori, Hidemichi Kouzu, Akiyoshi Hashimoto, Masaki Katayose, Toshiyuki Yano

ESC Heart Failure ( Wiley ) 9 ( 6 ) 4358 - 4365 2022年09月 [国際誌]

AIMS: Reduction in appendicular skeletal muscle mass index (ASMI) assessed by dual-energy X-ray absorptiometry (DEXA) has been shown to be independently associated with a higher mortality rate in patients with heart failure (HF). However, DEXA is not suitable for measurement of muscle mass in a daily clinical setting and in large population-based studies. The aim of this study was to determine whether ASMI predicted from anthropometric indicators (predicted ASMI) serves as an alternative to DEXA-measured ASMI for predicting all-cause death in HF patients. METHODS AND RESULTS: Data for 539 HF patients who received a DEXA scan and measurements of calf circumferences (CC) and mid-arm circumferences (MAC) in our hospital were analysed. Predicted ASMI was calculated as we previously reported: predicted ASMI (kg/m2 ) = [0.214 × weight (kg) + 0.217 × CC (cm) - 0.189 × MAC (cm) + 1.098 (male = 1, female = -1) + 0.576]/height2 (m2 ). Low ASMI values were defined as <7.00 kg/m2 and <5.40 kg/m2 for men and women, respectively, according to the criteria of the Asian Working Group for Sarcopenia. The median follow-up period was 1.75 years (interquartile range, 0.96-2.37 years), and 79 patients (15%) died. Kaplan-Meier survival curves showed that patients with low DEXA-measured ASMI and patients with low predicted ASMI had significantly lower survival rates than those for patients with high ASMI. In multivariate Cox proportional hazard analyses adjusted for age, sex, logarithmic B-type natriuretic peptide, cystatin C based-estimated glomerular filtration rate, and gait speed, DEXA-measured ASMI [hazard ratio (HR), 0.982; 95% confidence interval (CI), 0.967-0.998; P = 0.026] and predicted ASMI (HR, 0.979; 95% CI, 0.962-0.996; P = 0.018) were independent predictors of all-cause mortality. Inclusion of predicted ASMI into the adjustment model significantly improved continuous net reclassification improvement (0.338; 95% CI, 0.103-0.572; P < 0.01) and integrated discrimination improvement (0.020; 95% CI, 0.004-0.035; P < 0.05) for predicting mortality after discharge. CONCLUSIONS: Predicted ASMI, as well as DEXA-measured ASMI, can predict all-cause death in HF patients, and calculation of predicted ASMI will be useful for detecting high-risk patients in a daily clinical setting and in large population-based studies.

DOI PubMed

Thiel法固定献体を用いたハムストリングス各筋の組織弾性と受動張力の関係

中尾学人, 谷口圭吾, 加藤拓也, 小出所大樹, 横山祐, 斎藤佑平, 渡邉耕太, 藤宮峯子, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 96 ( 8 ) S1683 - S1683 2022年09月

Effect of subcutaneous adipose tissue and muscle thicknesses on rectus femoris and vastus intermedius ultrasound echo intensities: a cadaver study

Hiroshi Akima, Keisuke Yamamori, Keigo Taniguchi, Mineko Fujimiya, Masaki Katayose, Akito Yoshiko, Noriko Tanaka

Journal of Ultrasound ( Springer Science and Business Media LLC ) 2022年08月 [国際誌]

PURPOSE: The purpose of this study was to examine the effect of subcutaneous adipose tissue (SCAT) thickness and rectus femoris (RF) muscle thickness on RF and vastus intermedius (VI) echo intensity using human cadavers. METHODS: The echo intensity of the RF and VI was measured in 11 legs of seven cadavers under three conditions: intact condition (Model 1), SCAT removed (Model 2), and SCAT and RF removed (Model 3). RESULTS: RF echo intensity in Model 1 (69.2 ± 20.3 a.u.) was significantly lower than that in Model 2 (83.4 ± 15.9 a.u.) (P = 0.003). VI echo intensity in Models 1 to 3 showed similar results to RF echo intensity (P = 0.003 to 0.001). Regarding the relationship between VI echo intensity and VI muscle thickness, the regression lines shifted upward in a parallel fashion in the order Model 1, Model 2, and Model 3. Multiple regression analysis revealed that the variation in RF echo intensity was explained by RF muscle thickness (P = 0.036) and SCAT thickness (P = 0.001), while the variation in VI echo intensity was explained by RF muscle thickness (P = 0.035). CONCLUSION: These results suggest that SCAT thickness and RF muscle thickness induce lower RF echo intensity, while RF muscle thickness induces lower VI echo intensity.

DOI PubMed

大腿四頭筋セッティング時の膝窩圧迫力と大腿四頭筋弾性の関係

小出所大樹, 河合誠, 時田諒, 青木昌弘, 寺本篤史, 金谷耕平, 片寄正樹, 谷口圭吾

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 33回 108 - 108 2022年07月

Relationship between scapular control during isometric shoulder flexion and scapular motion during baseball pitching: a cross-sectional study.

Yuki Nomura, Hajime Toda, Masaki Katayose, Shun Watanabe, Masahiro Yoshida, Makoto Yoshida, Keizo Yamamoto

BMC sports science, medicine & rehabilitation 14 ( 1 ) 76 - 76 2022年04月 [国際誌]

BACKGROUND: A baseball pitcher with decreased scapular control may not be able to achieve suitable scapular motion at maximum shoulder external rotation (MER) of baseball pitching during the pitching action. It is common clinically to compare scapular control of the throwing and non-throwing arms to detect side-to-side differences. However, it remains unclear whether scapular control is different between the throwing and non-throwing arms. Moreover, no data exist on the relationship between scapular control and scapular motion at MER of pitching. Primarily, this study aimed to compare scapular control during isometric shoulder flexion between the throwing and non-throwing arms. Secondly, this study aimed to investigate the relationship between scapular control during isometric shoulder flexion and scapular motion at MER of pitching. METHODS: Fifteen healthy collegiate baseball pitchers (age, 20.2 ± 1.9 years; height, 1.76 ± 0.05 m; body mass, 73.3 ± 6.7 kg) were recruited. An optical motion tracking system was used to assess scapular motion. Scapular control was defined as the amount of change in the scapular internal rotation angle, downward rotation angle, and anterior tilt angle during isometric shoulder flexion. We assessed scapular position at MER of pitching. RESULTS: No significant differences were detected for any of the scapular angles during isometric shoulder flexion between the throwing and non-throwing arms. The amount of change in the scapular internal rotation angle, scapular downward rotation angle, and scapular anterior tilt angle during isometric shoulder flexion had a significant relationship with the scapular downward rotation angle at MER. CONCLUSIONS: No side-to-side difference was noted in scapular control during isometric shoulder flexion in healthy collegiate baseball pitchers at the group level. Further studies are required to understand the side-to-side differences at the individual level. Additionally, there was a relationship between scapular control during isometric shoulder flexion and scapular position at MER. These findings suggest that clinicians may consider using isometric shoulder flexion to assess scapular control in baseball pitchers.

DOI PubMed

Adductor longus: An anatomical study to better understand groin pain.

Takuya Kato, Keigo Taniguchi, Taiki Kodesho, Gakuto Nakao, Yu Yokoyama, Yuhei Saito, Masaki Katayose

Clinical anatomy (New York, N.Y.) 35 ( 7 ) 867 - 872 2022年04月 [国際誌]

We investigated the shear modulus-passive force relationship in the hip adductor longus (AL) muscles of human cadavers and explored the effect of muscle architecture on the elastic properties of the AL muscle using shear wave elastography (SWE). Nine AL muscles were harvested from a soft, embalmed cadaver. The AL muscles were affixed to a custom-built device comprising two clamps, a pulley, and a cable to provide passive loads, which were increased from 0 to 600 g in 60-g increments. The shear modulus of the AL muscle was measured in the proximal (Pro), middle (Mid), and distal (Dis) regions. The masses and anatomical cross-sectional areas (ACSAs) of the AL muscles were measured. The shear modulus-passive load relationship of each tested muscle region was analyzed by fitting a least-squares regression line. Moreover, the rate of increase in the shear modulus per unit load (s) was calculated. The shear modulus and passive force were linearly correlated for all AL muscles in each region (p < 0.01). The mean coefficients of determination (R2 ) for Pro, Mid, and Dis were 0.989, 0.986, and 0.982, respectively. The rate of increase in the shear modulus per unit load significantly correlated with the reciprocal of the muscle mass (r = 0.77, p = 0.02) and ACSA (r = 0.43, p = 0.03). Shear wave elastography can be used as an indirect measure of passive force in any region of the AL muscle. Additionally, the rate of increase in the shear modulus per unit load could be associated with muscle architectural parameters.

DOI PubMed

多様なフレイル・サルコペニアと心疾患との関係サルコペニア合併心不全における骨粗鬆症の併存率ならびに生活機能への影響

片野唆敏, 長岡凌平, 矢野俊之, 沼澤瞭, 本間傑, 大堀克彦, 神津英至, 渡辺絢子, 藤戸健史, 西川諒, 大和田渉, 永野伸卓, 橋本暁佳, 片寄正樹, 土橋和文

日本循環器学会学術集会抄録集 ( (一社)日本循環器学会 ) 86回 CS3 - 5 2022年03月

腱板修復術後症例における肩関節周囲筋の収縮時スティフネスと最大等尺性肩甲骨面外転筋力の関係

榊善成, 谷口圭吾, 及川直樹, 金谷耕平, 片寄正樹, 倉秀治, 岡村健司

日本整形外科超音波学会会誌 ( 日本整形外科超音波学会 ) 32 ( 1 ) 32 - 39 2022年03月

腱板修復術後症例に対する理学療法では、肩関節周囲筋の発揮張力を把握することが重要である。しかし、腱板修復術後症例における肩関節周囲筋の発揮張力が肩甲骨面外転トルクに及ぼす影響は明らかではない。我々は、発揮張力を反映する筋収縮時スティフネスを指標に肩関節周囲筋の収縮時スティフネスと最大等尺性肩甲骨面外転筋力の関係を調査した。対象は腱板修復術後6ヵ月の症例8名とした。課題は肩甲骨面30°外転保持運動とした。患側の棘上筋(前方・後方線維の浅層部と深層部)と三角筋中部線維、僧帽筋上部線維の筋スティフネスと最大等尺性外転筋力の関係を重回帰分析にて検討した。その結果、棘上筋前方線維浅層部のスティフネスが、最大等尺性外転筋力を説明する有意な変数として選択された。したがって、腱板修復術後6ヵ月時の症例では、棘上筋前方線維浅層部の収縮時スティフネスが最大等尺性肩甲骨面外転筋力と強く関連する可能性がある。(著者抄録)

The Short-term Outcomes of Physiotherapy for Patients with Acetabular Labral Tears: An Analysis according to Severity of Injury in Magnetic Resonance Imaging.

Makoto Kawai, Kenji Tateda, Yuma Ikeda, Ima Kosukegawa, Satoshi Nagoya, Masaki Katayose

Hip & pelvis 34 ( 1 ) 45 - 55 2022年03月 [国際誌]

Purpose: The aim of this study was to evaluate the short-term outcome of physiotherapy in patients with acetabular labral tears and to assess the effectiveness of physiotherapy according to the severity of the labral tear. Materials and Methods: Thirty-five patients who underwent physiotherapy for treatment of symptomatic acetabular labral tears were enrolled. We evaluated the severity of the acetabular labral tears, which were classified based on the Czerny classification system using 3-T MRI. Clinical findings of microinstability and extra-articular pathologies of the hip joint were also examined. The International Hip Outcome Tool 12 (iHOT12) was use for evaluation of outcome scores pre- and post-intervention. Results: The mean iHOT12 score showed significant improvement from 44.0 to 73.6 in 4.7 months. Compared with pre-intervention scores, significantly higher post-intervention iHOT12 scores were observed for Czerny stages I and II tears (all P<0.01). However, no significant difference was observed between pre-intervention and post-intervention iHOT12 scores for stage III tears (P=0.061). In addition, seven patients (20.0%) had positive microinstability findings and 22 patients (62.9%) had findings of extra-articular pathologies. Of the 35 patients, eight patients (22.9%) underwent surgical treatment after failure of conservative management; four of these patients had Czerny stage III tears. Conclusion: The iHOT12 score of patients with acetabular labral tears was significantly improved by physiotherapy in the short-term period. Improvement of the clinical score by physiotherapy may be poor in patients with severe acetabular labral tears. Determining the severity of acetabular labral tears can be useful in determining treatment strategies.

DOI PubMed

股関節外転に伴う長内転筋の力学ストレスは股関節伸展位で増大する

加藤拓也, 谷口圭吾, 小出所大樹, 中尾学人, 横山祐, 齋藤佑平, 片寄正樹, 渡邉耕太, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 96 ( 3 ) S1170 - S1170 2022年03月

Posterior shoulder capsule of the dominant arm is stiffer in baseball players than that in non-throwing population.

Naoya Iida, Keigo Taniguchi, Shogo Soma, Kazuya Saizaki, Hajime Toda, Kota Watanabe, Masaki Katayose

Journal of shoulder and elbow surgery 31 ( 7 ) 1335 - 1343 2022年02月 [国際誌]

BACKGROUND: Posterior shoulder capsule tightness is one of the factors for shoulder injuries in overhead athletes. Recent studies have shown the posterior capsule of the dominant arm to be stiffer than that of the non-dominant arm in baseball players. However, whether posterior capsule tightness in the dominant arm is exclusive to overhead athletes remains unknown. This study aimed to investigate whether the posterior shoulder capsule of the dominant arm in baseball players is stiffer than that in non-throwing population. METHODS: Fifteen male collegiate asymptomatic baseball players (baseball-player group) and fifteen male college students who did not partake in overhead sports (non-throwing group) participated in this study. We measured the shear moduli of the middle and inferior posterior capsules, superior infraspinatus, inferior infraspinatus, teres minor, and posterior deltoid in the dominant arm using ultrasound shear wave elastography. We compared shear moduli between the two groups using an independent samples t-test and Mann-Whitney test. In addition, we investigated the correlation between the range of glenohumeral internal rotation and each shear modulus in each group using the Pearson correlation coefficient. RESULTS: The shear moduli in the baseball-player group were significantly higher than those in the non-throwing group in both the middle posterior capsule (baseball-players group: 36.1 ± 5.6 kPa vs. non-throwing group: 29.0 ± 8.6 kPa; p = 0.018) and inferior posterior capsule (37.1 ± 9.6 kPa vs. 27.9 ± 6.8 kPa; p = 0.002). However, no difference in the shear moduli of individual muscle groups was identified. The glenohumeral internal rotation range exhibited a statistically significant negative correlation with the shear modulus of the inferior posterior capsule in the baseball-player group (Pearson correlation coefficient = -0.586, p = 0.022). CONCLUSION: Our findings suggest that the posterior shoulder capsule of the dominant arm in baseball players is stiffer than that in non-throwing population.

DOI PubMed

非侵襲的な手法により生体組織の特性や運動適応を探る〜アスリートから高齢者まで〜画像評価から診る運動器のスティフネスと力学ストレスの関係性

谷口圭吾, 小出所大樹, 飯田尚哉, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 71 ( 1 ) 39 - 39 2022年02月

Time-course changes in active stiffness of the supraspinatus muscle after arthroscopic rotator cuff repair.

Yoshinari Sakaki, Keigo Taniguchi, Fumiko Sato, Naoki Oikawa, Masaki Katayose, Hideji Kura, Kenji Okamura

Journal of medical ultrasonics (2001) 49 ( 1 ) 77 - 84 2022年01月 [国内誌]

PURPOSE: This study aimed to investigate the time-course changes in the active stiffness of the supraspinatus muscle after arthroscopic rotator cuff repair. METHODS: Eight male patients (mean age 61.5 ± 9.4 years) who underwent arthroscopic rotator cuff repair for small to medium tears were recruited for this study. Movement tasks included 30° shoulder isometric abduction and maximal voluntary isometric contraction of shoulder abduction in the scapular plane. The stiffness of the supraspinatus (anterior superficial, anterior deep, posterior superficial, and posterior deep regions), upper trapezius, and middle deltoid muscles in bilateral shoulders was recorded using ultrasound shear wave elastography. For each subject, the measurement was performed preoperatively and 3, 6, and 12 months postoperatively. RESULTS: The stiffness of the affected anterior superficial region of the supraspinatus muscle 12 months postoperatively was significantly higher than that measured preoperatively and 3 months postoperatively (p < 0.05); it was significantly higher at 6 months postoperatively than at 3 months postoperatively (p < 0.05). Further, the maximal voluntary isometric contraction had significantly improved 12 months postoperatively compared to that measured preoperatively and 3 months postoperatively (p < 0.05). The stiffness of the affected upper trapezius and middle deltoid muscles 12 months postoperatively was significantly lower than that preoperatively (p < 0.05). CONCLUSION: The maximal voluntary isometric contraction 12 months postoperatively possibly increased because of improvement in the active stiffness of the anterior superficial region. Active stiffness of the anterior superficial region may improve 6 months rather than 3 months postoperatively because of the different stages of muscle force, structural repair tendon strength, and remodeling.

DOI PubMed

中足趾節関節の他動的伸展がアーチ剛性に与える影響

小田航平, 根岸奎輔, 本村遼介, 寺本篤史, 渡邉耕太, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 30 ( 1 ) 83 - 88 2022年01月

中足趾節(Metatarsophalangeal:MTP)関節の他動的伸展は、足部アーチの剛性(アーチ剛性)を高める働きがあるとされているが、科学的に検討されていない。本研究の目的は、MTP関節の他動的伸展がアーチ剛性に与える影響を検証することとした。健常男性14名を対象に3つのMTP関節伸展角度条件(0°、30°、60°)におけるアーチ剛性の違いを2つの荷重条件(両脚立位、片脚立位)で検討した。結果として、片脚立位ではMTP関節伸展0°・30°と比べて60°でアーチ剛性が有意に高値を示した。両脚立位においては、MTP関節伸展角度間で有意差はみられなかった。本研究から、荷重下におけるアーチ剛性は、MTP関節伸展角度と荷重量の影響を受けることがわかり、アーチ剛性を実際に高めるためにはMTP関節伸展60°、また片脚立位程度の荷重量が必要な条件となることが示唆された。(著者抄録)

ハムストリングスの筋疲労が最大随意収縮中の筋活動部位特異性に及ぼす影響

青木信裕, 奥山恵伍, 片寄正樹

スポーツ理学療法学 ( (一社)日本スポーツ理学療法学会 ) 2 ( Suppl. ) PS - 08 2022年

Barthel Index Score Predicts Mortality in Elderly Heart Failure - A Goal of Comprehensive Cardiac Rehabilitation.

Satoshi Katano, Toshiyuki Yano, Katsuhiko Ohori, Hidemichi Kouzu, Ryohei Nagaoka, Suguru Honma, Kanako Shimomura, Takuya Inoue, Yuhei Takamura, Tomoyuki Ishigo, Ayako Watanabe, Masayuki Koyama, Nobutaka Nagano, Takefumi Fujito, Ryo Nishikawa, Wataru Ohwada, Akiyoshi Hashimoto, Masaki Katayose, Sumio Ishiai, Tetsuji Miura

Circulation journal : official journal of the Japanese Circulation Society 86 ( 1 ) 70 - 78 2021年12月 [国内誌]

BACKGROUND: A strategy to predict mortality in elderly heart failure (HF) patients has not been established.Methods and Results:We retrospectively enrolled 413 HF patients aged ≥65 years (mean age 78 years) who had received comprehensive cardiac rehabilitation (CR) during hospitalization. Basic activities of daily life were assessed before discharge using the Barthel index (BI). Of 413 HF patients, 116 (28%) died during a median follow-up period of 1.90 years (interquartile range 1.20-3.23 years). An adjusted dose-dependent association analysis showed that the hazard ratio (HR) of mortality increased in an almost linear manner as the BI score decreased, and that a BI score of 85 corresponded to an HR of 1.0. Kaplan-Meier survival curves showed that the survival rate was lower for patients with a low BI (<85) than for those with a high BI (≥85; 65% vs. 74%, respectively; P=0.007). In multivariate Cox regression analyses, low BI was independently associated with higher mortality after adjusting for predictors, including B-type natriuretic peptide. Inclusion of the BI into the adjusted model improved the accuracy of the prediction of mortality. CONCLUSIONS: A BI score <85 at the time of discharge is associated with increased mortality independent of known prognostic markers, and achieving functional status with a BI score ≥85 by comprehensive CR during hospitalization may contribute to favorable outcomes in elderly HF patients.

DOI PubMed

Correction to: High-but not moderate-intensity exercise acutely attenuates hypercapnia-induced vasodilation of the internal carotid artery in young men.

Rintaro Sakamoto, Masaki Katayose, Yutaka Yamada, Toru Neki, Tatsuki Kamoda, Katsuyuki Tamai, Kotomi Yamazaki, Erika Iwamoto

European journal of applied physiology 121 ( 11 ) 3259 - 3259 2021年11月 [国際誌]

DOI PubMed

Effects of shoulder abduction on the stiffness of supraspinatus muscle regions in rotator cuff tear.

Yoshinari Sakaki, Keigo Taniguchi, Masaki Katayose, Hideji Kura, Kenji Okamura

Clinical anatomy (New York, N.Y.) 35 ( 1 ) 94 - 102 2021年10月 [査読有り] [国際誌]

This study aimed to compare the effect of the load of the upper limb on the stiffness of supraspinatus muscle regions during isometric shoulder abduction in the scapular plane in healthy individuals and patients with a rotator cuff tear. Thirteen male patients were scheduled for arthroscopic rotator cuff repair, and 13 healthy male individuals were recruited. The movement task involved 30° isometric shoulder abduction in the scapular plane. The tasks included passive abduction, abduction with half-weight of the upper limb (1/2-weight), and full weight of the upper limb (full-weight). The stiffness of the supraspinatus muscle (anterior superficial, anterior deep, posterior superficial, and posterior deep regions) was recorded using ultrasound shear-wave elastography. The stiffness of the anterior superficial region on the affected side was significantly lower than that on the control side for the 1/2-weight and full-weight tasks. The stiffness of the anterior deep, posterior superficial, and posterior deep regions was not affected. This is the first study that investigated the mechanical effects of different loads on different supraspinatus muscle regions in rotator cuff tear patients. Our results indicate that the anterior superficial region in rotator cuff tear patients was mainly responsible for reduced active stiffness. This might be because this region contributes to force exertion and exhibits atrophy in rotator cuff tears. Hence, the anterior superficial region could be a focal point of quantitative dysfunction evaluation of the supraspinatus muscle in the case of a rotator cuff tear.

DOI PubMed

Elasticity of baseball players’ posterior shoulder capsule during internal rotation stretching at 30 degrees of scaption

Naoya Iida, Keigo Taniguchi, Kazuya Saizaki, Shogo Soma, Hajime Toda, Masaki Katayose

Translational Sports Medicine ( Wiley ) 2021年10月

DOI

初期腰椎分離症における第5腰椎の形態学的特徴相同モデルを用いた三次元解析

山根裕司, 戸田創, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 29 ( 4 ) S209 - S209 2021年10月

ジャックナイフストレッチングの即時効果脊柱屈曲可動域およびハムストリングスの弾性率に着目して

中尾学人, 山根裕司, 谷口圭吾, 片寄正樹, 渡邉耕太, 山下敏彦

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 29 ( 4 ) S169 - S169 2021年10月

Tokyo2020+1の医事運営理学療法サービス

片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 29 ( 4 ) S77 - S77 2021年10月

ハムストリングス筋のせん断弾性係数に及ぼす能動的、受動的静的ストレッチの急性効果(Acute effect of active and passive static stretching on shear elastic modulus of the hamstring muscles)

Nakao Gakuto, Taniguchi Keigo, Katayose Masaki

日本基礎理学療法学会学術大会プログラム・抄録集 ( (一社)日本基礎理学療法学会 ) 26回 1G19 - 01 2021年10月

High-but not moderate-intensity exercise acutely attenuates hypercapnia-induced vasodilation of the internal carotid artery in young men.

Rintaro Sakamoto, Masaki Katayose, Yutaka Yamada, Toru Neki, Tatsuki Kamoda, Katsuyuki Tamai, Kotomi Yamazaki, Erika Iwamoto

European journal of applied physiology 121 ( 9 ) 2471 - 2485 2021年09月 [国際誌]

PURPOSE: Exercise-induced increases in shear rate (SR) across different exercise intensities may differentially affect hypercapnia-induced vasodilation of the internal carotid artery (ICA), a potential index of cerebrovascular function. We aimed to elucidate the effects of exercise intensity on ICA SR during exercise and post-exercise hypercapnia-induced vasodilation of the ICA in young men. METHODS: Twelve healthy men completed 30 min of cycling at moderate [MIE; 65 ± 5% of age-predicted maximal heart rate (HRmax)] and high (HIE; 85 ± 5% HRmax) intensities. Hypercapnia-induced vasodilation was induced by 3 min of hypercapnia (target end-tidal partial pressure of CO2 + 10 mmHg) and was assessed at pre-exercise, 5 min and 60 min after exercise. Doppler ultrasound was used to measure ICA diameter and blood velocity during exercise and hypercapnia tests. RESULTS: SR was not altered during either exercise (interaction and main effects of time; both P > 0.05). ICA conductance decreased during HIE from resting values (5.1 ± 1.3 to 3.2 ± 1.0 mL·min-1·mmHg-1; P < 0.01) but not during MIE (5.0 ± 1.3 to 4.0 ± 0.8 mL·min-1·mmHg-1; P = 0.11). Consequently, hypercapnia-induced vasodilation declined immediately after HIE (6.9 ± 1.7% to 4.0 ± 1.4%; P < 0.01), but not after MIE (7.2 ± 2.1% to 7.3 ± 1.8%; P > 0.05). Sixty minutes after exercise, hypercapnia-induced vasodilation returned to baseline values in both trials (MIE 8.0 ± 3.1%; HIE 6.4 ± 2.9%; both P > 0.05). CONCLUSION: The present study showed blunted hypercapnia-induced vasodilation of the ICA immediately after high-intensity exercise, but not a moderate-intensity exercise in young men. Given that the acute response is partly linked to the adaptive response in the peripheral endothelial function, the effects of aerobic training on cerebrovascular health may vary depending on exercise intensity.

DOI PubMed

Novel prediction equation for appendicular skeletal muscle mass estimation in patients with heart failure: Potential application in daily clinical practice.

Satoshi Katano, Toshiyuki Yano, Katsuhiko Ohori, Nobutaka Nagano, Suguru Honma, Kanako Shimomura, Tomoyuki Ishigo, Ayako Watanabe, Remi Honma, Takefumi Fujito, Masayuki Koyama, Hidemichi Kouzu, Akiyoshi Hashimoto, Masaki Katayose, Tetsuji Miura

European journal of preventive cardiology 28 ( 9 ) e18-e21 2021年08月 [国際誌]

DOI PubMed

Energy intake during hospital stay predicts all-cause mortality after discharge independently of nutritional status in elderly heart failure patients.

Satoshi Katano, Toshiyuki Yano, Hidemichi Kouzu, Katsuhiko Ohori, Kanako Shimomura, Suguru Honma, Ryohei Nagaoka, Takuya Inoue, Yuhei Takamura, Tomoyuki Ishigo, Ayako Watanabe, Masayuki Koyama, Nobutaka Nagano, Takefumi Fujito, Ryo Nishikawa, Wataru Ohwada, Akiyoshi Hashimoto, Masaki Katayose, Tetsuji Miura

Clinical research in cardiology : official journal of the German Cardiac Society 110 ( 8 ) 1202 - 1220 2021年08月 [国際誌]

OBJECTIVE: Malnutrition is associated with an increased risk of mortality in heart failure (HF) patients. Here, we examined the hypothesis that assessment of energy intake in addition to nutritional status improves the stratification of mortality risk in elderly HF patients. METHODS: We retrospectively examined 419 HF patients aged ≥ 65 years (median 78 years, 49% female). Nutritional status was assessed by the Mini Nutritional Assessment Short Form (MNA-SF), and daily energy intake was calculated from intake during 3 consecutive days before discharge. RESULTS: During a median 1.52-year period (IQR 0.96-2.94 years), 110 patients (26%) died. Kaplan-Meier survival curves showed that patients with low tertile of daily energy intake had a higher mortality rate than did patients with high or middle tertile of daily energy intake. In multivariate Cox regression analyses, low daily energy intake was independently associated with higher mortality after adjustment for the model including age, sex, BNP, Charlson Comorbidity Index, history of HF hospitalization, and cachexia in addition to MNA-SF. Inclusion of both MNA-SF and energy intake into the adjustment model improved the accuracy of prediction of the mortality after discharge (continuous net reclassification improvement, 0.355, p = 0.003; integrated discrimination improvement, 0.029, p = 0.003). Results of a fully adjusted dose-dependent association analysis showed that risk of all-cause mortality was lowest among HF patients who consumed 31.5 kcal/kg/day of energy. CONCLUSIONS: Energy intake during hospital stay is an independent predictor of the mortality in elderly HF patients, and its assessment together with established predictors improves the mortality risk stratification.

DOI PubMed

カッティング動作中の床反力における内側ハムストリングの機能選択的筋疲労条件を用いた検討

山津健太, 青木信裕, 片寄正樹, 渡邉耕太, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 95 ( 8 ) S1496 - S1496 2021年08月

皮膚・深筋膜および筋間結合が大腿直筋弾性の不均一性に与える影響

小出所大樹, 谷口圭吾, 加藤拓也, 溝口照悟, 横山祐, 斎藤佑平, 渡邉耕太, 藤宮峯子, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 95 ( 8 ) S1825 - S1825 2021年08月

ヒト長内転筋の組織弾性と受動張力の関係 Thiel法固定献体を用いた検討

加藤拓也, 谷口圭吾, 小出所大樹, 横山祐, 斎藤佑平, 渡邉耕太, 藤宮峯子, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 95 ( 8 ) S1825 - S1825 2021年08月

Does renin-angiotensin system inhibition have impacts on muscle mass and bone mineral density in heart failure patients?

Satoshi Katano, Toshiyuki Yano, Masaki Shimizu, Katsuhiko Ohori, Hidemichi Kouzu, Masayuki Koyama, Ryohei Nagaoka, Takuya Inoue, Yuhei Takamura, Tomoyuki Ishigo, Hiroyuki Takashima, Masaki Katayose, Hirofumi Ohnishi, Tetsuji Miura

ESC heart failure 8 ( 4 ) 2617 - 2624 2021年08月 [国際誌]

AIMS: Results of experimental studies have indicated the possibility of muscle and bone mass being negatively regulated by renin-angiotensin system (RAS) activation, but that possibility has not been analysed in patients with heart failure (HF). METHODS AND RESULTS: Data for HF patients who received a dual-energy X-ray absorptiometry scan in our hospital were reviewed. Propensity scores for the use of RAS inhibitors (RASIs) were calculated using a multivariate logistic regression model to minimize selection bias. One hundred sixty pairs of patients were extracted. Plasma aldosterone concentration was significantly lower in the RASIs group than in the no-RASIs group (119 [IQR 71-185] vs. 94 [IQR 60-131] pg/mL, P = 0.003), confirming RAS inhibition in the RASIs group. Skeletal muscle mass index tended to be higher in the RASIs group than in the non-RASIs group (15.6 [IQR 14.0-17.2] vs. 15.0 [IQR 13.3-16.6] pg/mL, P = 0.065). The proportion of patients with muscle wasting, defined as appendicular skeletal muscle mass indexes of <7.00 and <5.40 kg/m2 for males and females, respectively, was significantly lower in the RASIs group than in the non-RASIs group (53% vs. 64%, P = 0.041). Multivariate logistic regression analysis showed that the no use of RASIs was associated with presence of muscle wasting independently of age, presence of diabetes, renal function, and severity of HF. Bone mineral densities and proportions of patients with osteoporosis were similar in the two groups. CONCLUSIONS: Renin-angiotensin system inhibition is associated with a lower prevalence of muscle wasting in HF patients independently of established risk factors.

DOI PubMed

腱板修復術症例における肩関節周囲筋の収縮時スティフネスと等尺性肩甲骨面最大外転筋力の関係

榊善成, 谷口圭吾, 佐藤史子, 及川直樹, 金谷耕平, 片寄正樹, 倉秀治, 岡村健司

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 32回 152 - 152 2021年07月

肩甲骨面挙上30°位での内旋ストレッチングが肩後方関節包のスティフネスに及ぼす急性効果野球経験者を対象とした検討

才崎和哉, 谷口圭吾, 飯田尚哉, 相馬章吾, 戸田創, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 32回 153 - 153 2021年07月

肩甲骨面挙上30°位での内旋ストレッチング中における肩後方関節包のスティフネス評価野球経験者を対象にした検討

飯田尚哉, 谷口圭吾, 才崎和哉, 相馬章吾, 戸田創, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 32回 153 - 153 2021年07月

下腿コンプレッションスリーブの装着が等尺性収縮時の腓腹筋弾性に及ぼす影響

小出所大樹, 谷口圭吾, 加藤拓也, 福與千鶴, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 32回 147 - 147 2021年07月

股関節屈曲角度が股関節屈曲運動時の長内転筋の弾性率に及ぼす影響

加藤拓也, 谷口圭吾, 小出所大樹, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 32回 148 - 148 2021年07月

Intramuscular differences in shear modulus of the rectus femoris muscle during passive knee flexion.

Taiki Kodesho, Keigo Taniguchi, Takuya Kato, Masaki Katayose

European journal of applied physiology 121 ( 5 ) 1441 - 1449 2021年05月 [国際誌]

PURPOSE: This study aimed to determine (1) intramuscular regional differences in the changes in the shear modulus of the rectus femoris (RF) muscle during passive knee flexion and (2) the relationship between shear modulus and passive knee extension torque. METHOD: The shear modulus maps as an index of muscle stiffness and the passive torque were obtained at seven regions during passive knee flexion at 2°/s within a knee joint range of motion of 0°-130° in 16 healthy males. RESULTS: The shear modulus of RF increased with the knee angle of flexion. The shear modulus of each longitudinal region was greater in the order of proximal, central, and distal region (p < 0.05). The relationship between the shear modulus and passive torque was highly fitted for all 16 subjects (p < 0.05). The mean coefficient of determination (R2) at second-order polynomial model per subject was 0.96 (± 0.03; range 0.61-0.99), and whole group was 0.58 (± 0.03; range 0.54-0.64) in all regions. CONCLUSIONS: The passive stiffness of RF was higher in the proximal region than in the other regions during passive knee flexion. Furthermore, the shear modulus-passive torque was related regardless of the measurement region within a muscle, and the results suggest that the passive knee extension torque reflects passive muscle stiffness of the RF.

DOI PubMed

カッティング動作中の床反力における内側ハムストリングの機能選択的筋疲労条件を用いた検討

山津健太, 青木信裕, 片寄正樹, 渡邉耕太, 山下敏彦

The Japanese Journal of Rehabilitation Medicine ( (公社)日本リハビリテーション医学会 ) 58 ( 特別号 ) 2 - 5 2021年05月

Relationship between shear elastic modulus and passive force of the human rectus femoris at multiple sites: a Thiel soft-embalmed cadaver study.

Taiki Kodesho, Keigo Taniguchi, Takuya Kato, Shougo Mizoguchi, Yoshiki Yamakoshi, Kota Watanabe, Mineko Fujimiya, Masaki Katayose

Journal of medical ultrasonics (2001) 48 ( 2 ) 115 - 121 2021年04月 [国内誌]

PURPOSE: Estimation of muscle passive force from elasticity using shear wave elastography (SWE) has been reported. However, the relationship between the elasticity and passive force of human muscles has not been elucidated. This study investigated the elastic modulus-passive force relationship in human skeletal muscles at multiple sites. METHODS: Four rectus femoris (RF) muscles were dissected from a human Thiel-embalmed cadaver. Calibration weights (0-600 g in 60-g increments) were applied to the distal tendon via a pulley system, and the shear elastic modulus as an index of elasticity was measured using SWE. The shear elastic modulus of the RF was measured at the proximal, central, and distal portions. RESULTS: The results demonstrated that the relationships between the elasticity in the longitudinal direction of the muscle and the passive force were nearly linear for all tested sites, with coefficients of determination ranging from 0.813 to 0.993. CONCLUSION: Shear wave elastography may be used as an indirect method to measure the changing passive force at any site within human muscles.

DOI PubMed

心不全患者における形態指標から推定した四肢骨格筋量の予後予測能の検討

本間傑, 片野唆敏, 矢野俊之, 長岡凌平, 神津英至, 大堀克彦, 渡辺絢子, 石郷友之, 大和田渉, 西川諒, 永野伸卓, 小山雅之, 片寄正樹, 橋本暁佳, 小林史, 善岡信博, 三浦哲嗣

日本循環器学会学術集会抄録集 ( (一社)日本循環器学会 ) 85回 CP06 - 7 2021年03月

心不全患者における形態指標から推定した四肢骨格筋量の予後予測能の検討

日本循環器学会学術集会抄録集 ( (一社)日本循環器学会 ) 85回 CP06 - 7 2021年03月

肩関節等尺性伸展時の肩甲骨安定性と投球動作時の肩甲骨運動との関連性

野村勇輝, 戸田創, 渡部峻, 山本敬三, 吉田昌弘, 吉田真, 片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 47 ( Suppl.1 ) SS2 - 4 2021年03月

ヒト大腿直筋の組織弾性と受動張力の関係 Thiel法固定人体標本を用いた検討

小出所大樹, 谷口圭吾, 加藤拓也, 溝口照悟, 渡邉耕太, 藤宮峯子, 片寄正樹

日本基礎理学療法学雑誌 ( (一社)日本基礎理学療法学会 ) 23 ( 1 ) 117 - 122 2021年03月

Thiel法固定人体標本のヒト大腿直筋を対象に、筋伸長時の受動張力-筋弾性関係を筋内の複数部位で検討した。研究対象として、大腿部に損傷や変形の無いThiel法固定人体標本の1体1肢(男性、死亡時84歳)を用いた。ヒト屍体の大腿直筋の長軸方向において測定した全ての部位で受動張力とせん断弾性率の間に強い正の相関を認め、回帰式の決定係数R2はいずれの部位でも0.9以上であった。さらに、2回の弾性計測における再現性はいずれの測定部位でも変動係数CVが1%未満、級内相関係数ICCが0.99以上と先行研究と同等の高い再現性が得られた。すなわち、ヒト大腿直筋は筋腹中央部のみならず近位部および遠位部においても筋弾性を用いた受動張力の推定が高い精度で可能であることを示す結果となった。

磁気刺激を用いた膝関節屈曲筋力における生理的・心理的限界の解明

青木信裕, 片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 47 ( Suppl.1 ) 207 - 207 2021年03月

国際総合競技大会における医療体制東京2020オリンピック・パラリンピックに向けて

片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 47 ( Suppl.1 ) 33 - 33 2021年03月

Sarcomere length of the vastus intermedius with the knee joint angle change.

Ryosuke Ando, Keigo Taniguchi, Shin Kikuchi, Shogo Mizoguchi, Mineko Fujimiya, Masaki Katayose, Hiroshi Akima

Physiological reports 9 ( 5 ) e14771 2021年03月 [国際誌]

The force-length relation of the skeletal muscles is an important factor influencing the joint torque at a given joint angle. We aimed to clarify the relationship between the resting sarcomere length and knee joint angle in the vastus intermedius (VI) and to compare it with that of the vastus lateralis (VL). The left and right legs were fixed at knee joint angles of 0° and 90°, respectively, in seven cadavers (age at the time of death: 70-91 years). Muscle tissues were dissected by necropsy of the VL and the VI, and electron microscopy images were obtained to calculate the sarcomere length. At knee joint angles of 0° and 90°, the VL sarcomere length was 2.28 ± 0.49 μm and 2.30 ± 0.48 μm, respectively, and the VI sarcomere length was 2.19 ± 0.35 μm and 2.46 ± 0.53 μm, respectively, with a significant difference between the two (p = 0.028). The magnitude of sarcomere length changes with knee joint angle changes was significantly greater for the VI (0.27 ± 0.20 μm) than for the VL (0.02 ± 0.09 μm) (p = 0.009). Thus, knee joint angle changes may affect the passive and active tension produced by the VI more than those produced by the VL.

DOI PubMed

Effects of menstrual cycle and menopause on internal carotid artery shear-mediated dilation in women.

Erika Iwamoto, Rintaro Sakamoto, Wakako Tsuchida, Kotomi Yamazaki, Tatsuki Kamoda, Toru Neki, Masaki Katayose, Darren P Casey

American journal of physiology. Heart and circulatory physiology 320 ( 2 ) H679-H689 2021年02月 [国際誌]

This study aimed to elucidate the effects of change in estrogen during the menstrual cycle and menopause on shear-mediated dilation of the internal carotid artery (ICA), a potential index of cerebrovascular endothelial function. Shear-mediated dilation of the ICA and serum estradiol were measured in 11 premenopausal (Pre-M, 21 ± 1 yr), 13 perimenopausal (Peri-M, 49 ± 2 yr), and 10 postmenopausal (Post-M, 65 ± 7 yr) women. Measurements were made twice within the Pre-M group at their early follicular (EF, lower estradiol) and late follicular (LF, higher estradiol) phases. Shear-mediated dilation was induced by 3 min of hypercapnia (target PETCO2 + 10 mmHg from individual baseline) and was calculated as the percent rise in peak diameter relative to baseline diameter. ICA diameter and blood velocity were simultaneously measured by Doppler ultrasound. In Pre-M, shear-mediated dilation was higher during the LF phase than during the EF phase (P < 0.01). Comparing all groups, shear-mediated dilation was reduced across the menopausal transition (P < 0.01), and Pre-M during the LF phase showed the highest value (8.9 ± 1.4%) compared with other groups (Pre-M in EF, 6.4 ± 1.1%; Peri-M, 5.5 ± 1.3%; Post-M, 5.2 ± 1.9%, P < 0.05 for all). Shear-mediated dilation was positively correlated with serum estradiol even after adjustment of age (P < 0.01, r = 0.55, age-adjusted; P = 0.02, r = 0.35). Collectively, these data indicate that controlling the menstrual cycle phase is necessary for the cross-sectional assessments of shear-mediated dilation of the ICA in premenopausal women. Moreover, current findings suggest that a decline in cerebrovascular endothelial function may be partly related to the reduced circulating estrogen levels in peri- and postmenopausal women.NEW & NOTEWORTHY The present study evaluated the effects of the menstrual cycle and menopause stages on the shear-mediated dilation of the ICA, a potential index of cerebrovascular endothelial function, in pre-, peri-, and postmenopausal women. Shear-mediated dilation of the ICA was increased from the low- to high-estradiol phases in naturally cycling premenopausal women and was reduced with advancing menopause stages. Furthermore, lower estradiol was associated with reduced shear-mediated dilation of the ICA, independent of age.

DOI PubMed

Effect of hip flexion angle on stiffness of the adductor longus muscle during isometric hip flexion.

Takuya Kato, Keigo Taniguchi, Daisuke Kikukawa, Taiki Kodesho, Masaki Katayose

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology 56 102493 - 102493 2021年02月 [国際誌]

This study examined the effect of hip flexion angle on the stiffness of the adductor longus (AL) muscle during isometric hip flexion. Seventeen men were recruited. Ten participants performed submaximal voluntary contraction at 0%, 25%, 50%, and 75% of maximal voluntary contraction (MVC) during isometric hip flexion after performing MVC at 0°, 40°, and 80° of hip flexion. Seven participants performed submaximal voluntary tasks during isometric hip extension in addition to hip flexion task. The shear modulus of the AL muscle was used as the index of muscle stiffness, and was measured using ultrasound shear-wave elastography during the tasks at each contraction intensity for each hip flexion angle. During hip flexion, the shear modulus of the AL muscle was higher at 0° than at 40° and 80° of hip flexion at each contraction intensity (p < 0.016). Conversely, a significant effect was not found among hip flexion angle during hip extension at 75% of MVC (p = 0.867). These results suggest that mechanical stress of the AL muscle may be higher at 0° of hip flexion during isometric hip flexion.

DOI PubMed

3次元動作解析を用いた空手道中段逆突き動作における形・組手選手間の比較

向沙杜子, 池田祐真, 山津健太, 佐々木翔平, 河合誠, 福士百合子, 青木信裕, 片寄正樹

スポーツ理学療法学 ( (一社)日本スポーツ理学療法学会 ) 1 ( Suppl. ) OS - 06 2021年

大腿骨骨肉腫に対して腫瘍広範切除および遊離血管柄付き腓骨移植術を施行した2例術後1年の残存筋機能に着目して

時田諒, 小出所大樹, 河合誠, 向沙杜子, 江森誠人, 村橋靖崇, 山下敏彦, 青木昌弘, 片寄正樹

北海道整形災害外科学会雑誌 ( 北海道整形災害外科学会 ) 63 ( 140th suppl ) 67 - 67 2021年

投球動作の足部接地時と肩関節最大外旋時における肩甲骨内旋角度の関連性

野村勇輝, 戸田創, 片寄正樹, 渡部峻, 吉田昌弘, 吉田真, 山本敬三

スポーツ理学療法学 ( (一社)日本スポーツ理学療法学会 ) 1 ( Suppl. ) OS - 02 2021年

Clinical Risk Factors and Prognostic Impact of Osteoporosis in Patients With Chronic Heart Failure.

Satoshi Katano, Toshiyuki Yano, Takanori Tsukada, Hidemichi Kouzu, Suguru Honma, Takuya Inoue, Yuhei Takamura, Ryohei Nagaoka, Tomoyuki Ishigo, Ayako Watanabe, Katsuhiko Ohori, Masayuki Koyama, Nobutaka Nagano, Takefumi Fujito, Ryo Nishikawa, Hiroyuki Takashima, Akiyoshi Hashimoto, Masaki Katayose, Tetsuji Miura

Circulation journal : official journal of the Japanese Circulation Society 84 ( 12 ) 2224 - 2234 2020年11月 [国内誌]

BACKGROUND: The clinical significance of osteoporosis in chronic heart failure (CHF) remains unclear.Methods and Results:A total of 303 CHF patients (75 years, [interquartile range (IQR) 66-82 years]; 41% female) were retrospectively examined. Bone mineral densities (BMDs) at the lumbar spine, femoral neck, and total femur were measured by using dual-energy X-ray absorptiometry (DEXA), and osteoporosis was diagnosed when the BMD at any of the 3 sites was <70% of the Young Adult Mean percentage (%YAM). The prevalence of osteoporosis in CHF patients was 40%. Patients with osteoporosis were older (79 [IQR, 74-86] vs. 72 [IQR, 62-80] years), included a large percentage of females, had slower gait speed and had a lower body mass index. Multivariate logistic regression analysis indicated that sex, BMI, gait speed, loop diuretics use and no use of direct oral anticoagulants (DOACs) were independently associated with osteoporosis. Kaplan-Meier survival curves showed that the rate of death and heart failure hospitalization was higher in patients with osteoporotic BMD at 2 or 3 sites than in patients without osteoporosis (hazard ratio 3.45, P<0.01). In multivariate Cox regression analyses, osteoporotic BMD at 2 or 3 sites was an independent predictor of adverse events after adjustment for prognostic markers. CONCLUSIONS: Loop diuretics use and no DOACs use are independently associated with osteoporosis in CHF patients. Osteoporosis is a novel predictor of worse outcome in patients with CHF.

DOI PubMed

Flexor hallucis longus tendinous slips and the relationship to toe flexor strength.

Kento Hirota, Kota Watanabe, Atsushi Teramoto, Yuki Saito, Masaki Katayose

Foot and ankle surgery : official journal of the European Society of Foot and Ankle Surgeons 27 ( 8 ) 851 - 854 2020年11月 [国際誌]

BACKGROUND: In the general population, the flexor hallucis longus (FHL) often has tendinous slips to lesser toes and the number of FHL slips varies between individuals. The purpose of this study was to investigate the relationship between the number of FHL tendinous slips in an individual foot and its toe flexor strength. METHODS: Forty healthy men were included in the study. The FHL branch test was used to assess each subject for the number of FHL tendinous slips. Toe flexor strength in each toe was measured using a force gauge. A two-way ANOVA was used to compare toe flexor strength between groups classified according to the number of FHL slips. RESULTS: The group of subjects with FHL branching to the second toe was the most common (20/40). The toe flexor strength ratio of the third toe was significantly lower in feet lacking FHL branching to the third toe than in those feet which did have branching to the third toe (P = 0.005). CONCLUSIONS: Toe flexor strength was affected by FHL tendinous slips. Considering the number of the FHL tendinous slips an individual foot has may be useful in clinical practice for rehabilitation or training of toe flexor muscles.

DOI PubMed

Shuhei Nozaki, Kota Watanabe, Atsushi Teramoto, Tomoaki Kamiya, Masaki Katayose, Naomichi Ogihara

Anatomical Science International ( Springer Science and Business Media LLC ) 96 ( 2 ) 258 - 264 2020年11月 [国内誌]

The high prevalence of foot pathologies in women and the elderly could be associated with gender and age difference in the morphology of the foot, particularly the morphology of the keystone of the foot, the talus. The present study investigated the orientation and curvature of the three articular surfaces of the talus in relation to sex and age based on computer tomography (CT), to identify possible morphological factors of the higher prevalence of foot disorders in women and elderly. Fifty-six participants were included in this study. The orientations of the talocrural, subtalar, and talonavicular joints were quantified three-dimensionally by calculating normal and principal axes of the articular surfaces defined by planar approximation. The curvature radii of the articular surfaces were quantified by cylindrical and spherical approximations. The talonavicular surface was significantly more twisted in the frontal plane and less adducted in the transverse plane in females than in males. With aging, the subtalar articular surface was significantly facing more posteriorly. Moreover, it was found that the curvature radii of the trochlea and navicular articular surfaces significantly increased with aging, indicating a flattening of these surfaces. The identified changes in the talar morphology with aging could potentially lead to a higher prevalence of foot disorders in the elderly.

DOI PubMed

Effective stretching positions for the posterior shoulder capsule as determined by shear wave elastography.

Naoya Iida, Keigo Taniguchi, Kota Watanabe, Hiroki Miyamoto, Tatsuya Taniguchi, Atsushi Teramoto, Masaki Katayose

Journal of shoulder and elbow surgery 30 ( 5 ) 1186 - 1195 2020年09月 [国際誌]

BACKGROUND: Stretching is often used to prevent and treat posterior shoulder capsule tightness; however, the most effective stretching positions are not clearly defined. The purpose of this study was to identify the stretching positions that specifically applied the greatest passive tension on the posterior shoulder capsule by evaluating the elastic characteristics of posterior capsules and muscles in various stretching positions using ultrasound shear wave elastography (SWE). METHODS: We evaluated 9 fresh-frozen shoulders (mean age 86.6 ± 7.7 years) without osteoarthritis or rotator cuff tears. All posterior shoulder tissues were preserved intact. Shear moduli of the middle and inferior posterior shoulder capsules and the posterior shoulder muscles were evaluated using SWE. We obtained shear modulus measurements in 9 stretching positions using a combination of glenohumeral elevation planes and angles (frontal, sagittal, scapular; -30°, 0°, 30°, 60°, respectively). A 4-Nm torque for shoulder internal rotation or horizontal adduction was applied in each position. We also measured shear moduli in the resting position (0° elevation with neutral shoulder internal/external rotation). We compared the shear moduli of all stretching and resting positions using 1-way repeated measures analysis of variance (P < .05). In addition, we compared the shear modulus in 2 positions (ie, resting and each stretching) among tissues (ie, capsules and muscles) with repeated measures using 2-way analysis of variance (P < .05). RESULTS: Shear modulus values for the middle posterior capsules in "internal rotation at 30° in scapular plane elevation" (28.7 ± 14.3 kPa, P = .01) and in "horizontal adduction at 60° of elevation" (31.1 ± 13.1 kPa, P < .001) were significantly higher than that of the resting position (11.0 ± 7.3 kPa). The shear modulus value for the inferior posterior capsule in "internal rotation at 30° of flexion" was significantly higher than that of the resting position (39.0 ± 17.3 vs. 15.4 ± 13.9 kPa, respectively; P = .004). Additionally, the shear modulus values for the posterior capsules in "internal rotation at 30° in scapular plane elevation and flexion" were significantly higher than that of the posterior shoulder muscles. CONCLUSION: Effective middle posterior shoulder capsule stretching positions were shoulder "internal rotation at 30° of scapular plane elevation" and "horizontal adduction at 60° of elevation." Shoulder "internal rotation at 30° of flexion" was the most effective position for the inferior posterior shoulder capsule. Stretching in these positions could relieve posterior shoulder capsule tightness and contribute to the prevention and treatment of throwing injuries of the shoulder.

DOI PubMed

腸腰筋ストレッチングが胸腰椎・骨盤アライメントへ与える効果の検証

石田優子, 寒川美奈, 大場健裕, 中村賢太郎, 片寄正樹, 山中正紀, 遠山晴一

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 28 ( 3 ) 501 - 505 2020年08月

脊柱骨盤アライメント変化や腸腰筋短縮は、腰痛発生の一要因とされ、腸腰筋に対するストレッチングの効果も示されている。しかし、腸腰筋ストレッチングの脊柱骨盤アライメントへの即時的な影響を調べた報告はない。本研究は腸腰筋ストレッチングの脊柱骨盤アライメントへの即時的な影響を調べた。対象は健常若年男性16名(年齢23.7±1.5歳)とした。腸腰筋柔軟性評価には、modified Thomas test時の股関節伸展角度を用いた。胸椎後彎および腰椎前彎角度はSpinal Mouseを用いて、骨盤傾斜角は上前腸骨棘と上後腸骨棘を結ぶ直線と水平線の成す角により測定した。腸腰筋ストレッチングは30秒5セット行った。その結果、股関節伸展角度の増加(p=0.001)と腰椎前彎の減少(p=0.011)を認めた。以上から、腸腰筋ストレッチングが股関節の柔軟性改善と腰椎アライメント変化を即時的にもたらすことが示された。(著者抄録)

Morphological characteristics of the lateral ankle ligament complex.

Takumi Kobayashi, Daisuke Suzuki, Yu Kondo, Ryo Tokita, Masaki Katayose, Hirofumi Matsumura, Mineko Fujimiya

Surgical and radiologic anatomy : SRA 42 ( 10 ) 1153 - 1159 2020年03月 [査読有り] [国際誌]

PURPOSE: The relevance of each ligament comprising the lateral ankle ligament complex, including the anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL), and posterior talofibular ligament (PTFL), has not been sufficiently elucidated; therefore, we aimed to clarify the morphological characteristics and relevance of these ligaments. METHODS: Total 152 legs from 152 Japanese cadavers were investigated. The lengths and widths of the ATFL, CFL, and PTFL were measured using a caliper. The ATFL was classified according to the number of fiber bundles (Types I, II, and III corresponded to one, two, and three fiber bundles, respectively), and the lengths and widths of the three ligaments were compared between the Type groups. In addition, the ratio of each ligament's length and width to the tibial length was calculated, and the correlation of the ratio of ligament length and width between the ATFL, CFL, and PTFL was examined about 34 legs. RESULTS: The ATFL, CFL, and PTFL were found to connect at the anterior/inferior tip of the lateral malleolus each other. The Type II group of the ATFL was most common (54.6%) in our investigated specimens. However, there were no significant inter-group differences in the lengths and widths of the CFL and PTFL. CONCLUSIONS: This study demonstrates that the lateral ankle ligaments may stabilize the ankle joint through interconnections.

DOI PubMed

Morphological variations of the human talus investigated using three-dimensional geometric morphometrics.

Shuhei Nozaki, Kota Watanabe, Tomoaki Kamiya, Masaki Katayose, Naomichi Ogihara

Clinical anatomy (New York, N.Y.) 34 ( 4 ) 536 - 543 2020年03月 [査読有り] [国際誌]

INTRODUCTION: The shape of the talus determines the positional and kinematic features of the subtalar, talonavicular, and talocrural joints during walking. Thus, detailed knowledge of the pattern of sexual dimorphism of the human talus may be useful for revealing the pathogenetic mechanism of foot and knee disorders, which are more prevalent in females. The aim of this study was to characterize and visualize the three-dimensional shape variations of the talus in relation to sex and age using geometric morphometrics. MATERIALS AND METHODS: Computed tomography images of 56 ft without talar injuries or disorders were used in this study. Thirty-seven anatomical landmarks were identified on a bone model of the talus to calculate principal components (PCs) of shape variations among specimens. PC scores were compared between sexes, and their correlations with age were also investigated. RESULTS: The female talus had a longer neck and narrower head width than the male talus. The superior trochlea was tilted more laterally in the frontal plane in females. Furthermore, the female talar head was more twisted and was more elongated in the dorsoplantar direction. CONCLUSIONS: Morphological features of the talus in females could alter the subtalar and talonavicular joint kinematics during walking and could be a structural factor in the pathogenetic mechanism underlying foot and knee disorders. This study contributes to the comprehensive understanding of shape variations in the human talus. This article is protected by copyright. All rights reserved.

DOI PubMed

股関節屈曲・伸展運動時における長内転筋の筋スティフネスに及ぼす股関節角度の影響

加藤拓也, 谷口圭吾, 神谷智昭, 寺本篤史, 渡邉耕太, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 94 ( 3 ) S995 - S995 2020年03月

Comparison of the sacral table angles by progression stage of lumbar spondylolysis.

Kazuhiro Sugawara, Noriyuki Iesato, Masaki Katayose

Spine deformity 8 ( 1 ) 123 - 127 2020年02月 [国際誌]

STUDY DESIGN: Retrospective study. OBJECTIVES: The purpose of this study was to investigate sacral table angle (STA) values in early-stage spondylolysis. Several studies suggested that the STA of patients with L5 spondylolysis or spondylolisthesis was significantly lower than that of healthy controls. Separation of the pars interarticularis creates shear stress between the upper sacral end plate and L5 vertebra. This was considered the cause of low STA in patients with spondylolysis or spondylolisthesis. However, if a low STA value is obtained in the early stage of L5 spondylolysis, it suggests that low STA does not result in the remodeling of the sacral end plate. METHODS: Patients with L5 spondylolysis and those with low back pain without pars defect were retrospectively identified from a hospital database in 2014-2016. Pars defect of the spondylolysis was classified into three categories based on CT and MRI results: early, progressive, or terminal stage. The STA difference between groups was calculated using one-way analysis of variance and Scheffe F test, which were used for post hoc testing. RESULTS: A total of 84 cases of L5 spondylolysis and 70 cases of low back pain were identified. No significant difference was found between the STAs of the early- or progressive-stage spondylolysis and the terminal-stage L5 spondylolysis and low back pain patients. The STA of the terminal-stage L5 spondylolysis was significantly lower than that of low back pain patients. CONCLUSIONS: In conclusion, patients with early- or progressive-stage spondylolysis do not have low STA. Low STA is seen only in patients with terminal-stage spondylolysis, suggesting that low STA is associated with remodeling changes in response to shear force after onset of spondylolysis. STA value might not important as a prognostic parameter about development of the spondylolysis. LEVEL OF EVIDENCE: Level IV.

DOI PubMed

Sex- and age-related morphological variations in the talar articular surfaces of the calcaneus

Nozaki S, Watanabe K, Kamiya T, Katayose M, Ogihara N

Annals of Anatomy 229 151468 - 151468 2020年01月 [査読有り] [国際誌]

BACKGROUND: The prevalence of foot pathologies, such as flatfoot deformity and hallux valgus, is higher in women and increases with age. It has been reported that these types of foot disorders may also be linked to excessive mobility of the subtalar joint to the eversion direction during weight bearing. Given that the mobility of the joint is determined by its articular morphology, sex- and age-related variations in the subtalar articular surface morphology are possible. The purpose of this study was to investigate the orientation and the curvature radii of the talar articular facets of the calcaneus in relation to age and sex using three-dimensional computer tomography. METHODS: Fifty-six feet without subtalar injuries or disorders were included in this study. The orientations of the talar articular surfaces of the calcaneus were quantified in the sagittal and coronal planes. The curvature radii of the articular surfaces of the calcaneus were also assessed based on the approximations of the sphere surfaces. RESULTS: The talar articular surface was oriented more anteriorly and medially in the females than in the males. The curvature radius of the calcaneal posterior facet in the females exhibited a positive correlation with age, indicative of increased articular surface flattening. CONCLUSIONS: The morphological features of the female calcaneus could induce excessive eversion and could lead to a higher prevalence of foot disorders, including flatfoot and hallux valgus, in elderly females. This study contributes to an understanding of the sexual dimorphism of the articular surfaces of the calcaneus and provides insight into the mechanisms that underline various foot disorders.

DOI PubMed

Acute hypotension attenuates brachial flow-mediated dilation in young healthy men.

Erika Iwamoto, Yutaka Yamada, Masaki Katayose, Rintaro Sakamoto, Toru Neki, Jun Sugawara, Shigehiko Ogoh

European journal of applied physiology 120 ( 1 ) 161 - 169 2020年01月 [査読有り] [国際誌]

PURPOSE: This study aimed to test our hypothesis that acute hypotension attenuates brachial flow-mediated dilation (FMD) as an index of endothelial function in healthy humans. METHODS: Twelve healthy men (21.8 ± 1.6 years, body mass index; 22.2 ± 1.6 kg/m2) participated in this study. Brachial FMD was measured in three trials: standardized FMD protocol (control trial), abrupt decrease in blood pressure (BP) via thigh cuff inflation-deflation (hypotension trial) and decrease in shear rate (SR) via a shortened forearm occlusion time (SR reduction trial). Brachial diameter and blood velocity were measured using Duplex ultrasound. RESULTS: Mean arterial pressure during reactive hyperaemia showed a marked decrease in the hypotension trial (- 23.7 ± 6.0 mmHg), but not in the control and SR reduction trials. SR area under the curve was attenuated in the SR reduction trial (P < 0.001), but not in the control and hypotension trials (P = 0.316). Consequently, FMD was attenuated in the hypotension and SR reduction trials compared with that in the control trial (P = 0.003 and P = 0.043, respectively), and was attenuated to a greater extent in the hypotension trial compared with the SR reduction trial (P = 0.006; control, 6.9 ± 3.5%; hypotension, 3.5 ± 1.7%; SR reduction, 5.0 ± 2.2%). After adjusting FMD using SR, FMD remained attenuated in the hypotension trial (P = 0.014), but not in the SR reduction trial. CONCLUSION: Our findings indicate that arterial pressure as well as sympathetic nervous system activation could be an important determinant of FMD. Blunted FMD of peripheral arteries may be a rational response to restore BP and/or prevent further reduction of BP following acute hypotension in healthy humans.

DOI PubMed

Relationship between shear modulus and passive tension of the posterior shoulder capsule using ultrasound shear wave elastography: A cadaveric study

Naoya Iida, Keigo Taniguchi, Kota Watanabe, Hiroki Miyamoto, Tatsuya Taniguchi, Mineko Fujimiya, Masaki Katayose

Journal of Biomechanics ( ELSEVIER SCI LTD ) 99 109498 - 109498 2020年01月 [査読有り] [国際誌]

Although shear wave elastography (SWE) has been used to indirectly measure passive tension in muscle tissues, it is unknown whether SWE can adequately evaluate passive tension in capsule tissues. This study investigated the relationship between the shear modulus and passive tension in the posterior shoulder capsule using SWE. Ten posterior middle and ten posterior inferior shoulder capsules were dissected from ten fresh-frozen cadavers; humeral head-capsule-glenoid specimens were created from each capsule. The humeral head and glenoid were immobilized with clamps in a custom-built device. Loads (0-400 g, in 25-g increments) were applied to each capsule via a pulley system; elasticity was simultaneously measured using SWE. The elasticity-load relationship of each tested capsule was analyzed by fitting a least-squares regression line to the data. Elasticity change due to creep or hysteresis effects was evaluated by comparing the elastic modulus for a 100-g load during and after the stepwise application of the loads. The observed relationship between the shear modulus and passive capsule tension was highly linear for all twenty tested capsules (p < 0.01). The mean coefficient of determination was 0.882 +/- 0.075 and 0.901 +/- 0.050 for the posterior middle and posterior inferior capsules, respectively. There was no difference in the shear modulus between the two 100-g load assessments for both the posterior middle (p = 0.205) and posterior inferior capsules (p = 0.161). Thus, SWE is a valid and useful method for indirectly evaluating the change in the passive tension under loading in specific posterior shoulder capsule. (C) 2019 Elsevier Ltd. All rights reserved.

DOI PubMed

Three-dimensional Morphological Variations of the Human Calcaneus Investigated Using Geometric Morphometrics.

Nozaki S, Watanabe K, Kamiya T, Katayose M, Ogihara N

Clinical anatomy (New York, N.Y.) 33 ( 5 ) 751 - 758 2019年10月 [査読有り] [国際誌]

The shape of the calcaneus determines the mechanical interaction of the foot with the ground during the heel-strike in human walking. Detailed knowledge of the pattern of sexual dimorphism of the human calcaneus could help to clarify the pathogenetic mechanism of foot and knee disorders, which are more prevalent in females. Therefore, the aim of this study was to characterize and visualize the three-dimensional shape variations of the calcaneus in relation to sex and age using geometric morphometrics. Computed tomography images of 56 feet without subtalar injuries or disorders were used in this study. Thirty-seven anatomical landmarks were identified on the bone model of the calcaneus to calculate principal components (PCs) of shape variations among specimens. The PC scores were compared between males and females, and their correlations with age were also analyzed. The female calcaneus was longer in length and shorter in height than that of males. The medial process of the calcaneal tuberosity in females was more inferiorly projected and the tuberosity was shifted more laterally. Also, the calcaneus was wider and the sustentaculum tali thickened with aging. Female structural features of the calcaneus alter the kinematics of the foot during walking and could be a structural factor in foot and knee disorders. This study contributes to a comprehensive understanding of shape variations in the human calcaneus. Clin. Anat., 33:751-758, 2020. © 2019 Wiley Periodicals, Inc.

DOI PubMed

超音波せん断波エラストグラフィを用いたヒト大腿直筋の受動張力評価の妥当性検証 Thiel法固定屍体を用いた検討

小出所大樹, 谷口圭吾, 溝口照悟, 神谷智昭, 寺本篤史, 渡邉耕太, 藤宮峯子, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 93 ( 8 ) S1768 - S1768 2019年09月

Flexor hallucis longus tendon branch test: Development and validation of a new method to assess anatomical variation of the tendinous slip

Kento Hirota, Kota Watanabe, Yuki Saito, Masaki Katayose

Foot and Ankle Surgery ( Elsevier {BV} ) 26 ( 6 ) 607 - 613 2019年08月 [査読有り] [国際誌]

BACKGROUND: The flexor hallucis longus (FHL) muscle often has a tendinous slip with a variable number of branches. We aimed at developing the FHL branch test to determine the number of FHL branches. METHODS: In anatomical validation study, 6 intact cadavers were used. The toe flexion angles were measured while the FHL and flexor digitorum longus (FDL) were manually pulled individually. For electrophysiological studies, 4 healthy men participated. The FHL was electrically stimulated, and electromyography (EMG) of the FHL and FDL were recorded during the FHL branch test. RESULTS: The toe flexion angles' changes in the FHL pulling condition were equivalent with pulling FDL in toes with FHL branching. The electrical stimulation of the FHL produced similar flexion as the FHL branch test. EMG of the FHL was higher than FDL during the FHL branch test (p=0.036). CONCLUSIONS: The FHL branch test could be used to evaluate the number of FHL branches.

DOI PubMed

肩関節後方関節包における受動的なスティフネスの定量評価未固定凍結人体標本を用いた検討

飯田尚哉, 谷口圭吾, 渡邉耕太, 宮本浩樹, 谷口達也, 藤宮峯子, 片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 46 ( Suppl.1 ) SS4 - 3 2019年08月

Effect of hip angle on neuromuscular activation of the adductor longus and adductor magnus muscles during isometric hip flexion and extension.

Takuya Kato, Keigo Taniguchi, Hiroshi Akima, Kohei Watanabe, Yuma Ikeda, Masaki Katayose

European journal of applied physiology 119 ( 7 ) 1611 - 1617 2019年07月 [査読有り] [国際誌]

PURPOSE: Neuromuscular activation of the adductor longus (AL) and adductor magnus (AM) muscles at different hip flexion angles during hip flexion and extension has not been clarified. This study aimed to compare the relationship between hip flexion angle and the electromyogram of the AL muscle with that of the AM muscle during isometric hip flexion and extension. METHODS: Fifteen healthy young men were included in this study. Participants performed maximal voluntary contractions during hip flexion and extension at six different hip flexion angles: - 20°, 0°, 20°, 40°, 60°, and 80°. The surface electromyograms of the AL and AM muscles were recorded. The root mean square (RMS) was calculated and normalized by the RMS during hip adduction for each individual muscle. RESULTS: The normalized RMS of the AL muscle was significantly higher than that of the AM muscle at a hip flexion angle of - 20° during hip flexion (P < 0.05). The mean normalized RMS of the AM muscle was significantly higher than that of the AL muscle during hip extension (P < 0.01). CONCLUSION: These results suggest that the AL muscle is recruited specifically at the hip-extended position during hip flexion, and that the AM muscle is recruited regardless of the hip position during hip extension. Thus, the AL and AM muscles may have different functional roles in different hip flexion angles.

DOI PubMed

心臓交感神経イメージにおいて集積低下例ほど心臓リハビリテーションの治療効果が期待できる

中田潤, 藤戸健史, 大堀克彦, 山直也, 矢野俊之, 橋本暁佳, 石合純夫, 片野唆敏, 本間傑, 下村佳奈子, 蝶野大樹, 片寄正樹

日本心臓核医学会ニュースレター ( 日本心臓核医学会 ) 21 ( 2 ) 120 - 120 2019年06月

Effective Stretching Position for the Tightness of Posterior Shoulder Capsule Determined by Shear Wave Elastography

Naoya Iida, Keigo Taniguchi, Kota Watanabe, Hiroki Miyamoto, Tatsuya Taniguchi, Mineko Fujimiya, Masaki Katayose

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE ( LIPPINCOTT WILLIAMS & WILKINS ) 51 ( 6 ) 646 - 646 2019年06月

DOI

The Effect of Novel Ankle-Realigning Socks on Dynamic Postural Stability in Individuals with Chronic Ankle Instability.

Kobayashi T, Watanabe K, Ito T, Tanaka M, Shida M, Katayose M, Gamada K

International journal of sports physical therapy 14 ( 2 ) 264 - 272 2019年04月 [査読有り] [国際誌]

BACKGROUND: A dynamic postural stability deficit has been suggested to be present in individuals with chronic ankle instability (CAI). Interventions to improve postural control in individuals with CAI have been reported, but they required a long period of and compliance with interventions. PURPOSE: To examine the effect of novel ankle-realigning socks on dynamic postural stability in individuals with CAI using the star excursion balance test (SEBT). STUDY DESIGN: Case-control study. METHODS: Twenty-eight control and 22 subjects with CAI (who were tested in both barefoot and with socks) were enrolled. The weight-bearing ankle dorsiflexion range of motion (DF-ROM) and SEBT were measured in the control group, the barefoot CAI group, and the CAI with socks group. In addition, subjective ankle instability during SEBT was measured using a visual analog scale (0 - 100). RESULTS: DF-ROM was 48.3 ± 7.4 º in the control group, 43.3 ± 8.0 º in the barefoot CAI group, and 45.7 ± 6.8 º in the CAI with socks group. DF-ROM was significantly less in the barefoot CAI group than in the control group. The SEBT scores were significantly less in the barefoot CAI group than in the control group in all directions. The SEBT score was significantly larger in the CAI with socks group than in the barefoot CAI group in the posteromedial, posterior, and posterolateral directions. In addition, there were no significant differences between the control group and the CAI with socks group in six directions. CONCLUSION: Wearing the novel ankle-realigning socks immediately improved dynamic postural stability as measured by the SEBT and subjective ankle instability in individuals with CAI. LEVEL OF EVIDENCE: Level 3b.

PubMed

ジャックナイフストレッチングの即時効果脊柱屈曲可動域およびハムストリングスの弾性率に着目して

中尾学人, 山根裕司, 谷口圭吾, 片寄正樹

札幌保健科学雑誌 ( 札幌医科大学保健医療学部 ) ( 8 ) 13 - 20 2019年03月 [査読有り]

ジャックナイフストレッチングの即時効果を、脊柱屈曲可動域およびハムストリングスの弾性率に着目して明らかにすることを目的に、健常男性15名(平均年齢26.0±5.4歳)を対象に、ストレッチ実施およびコントロールの2条件における立位体前屈時の指床間距離(FFD)、脊柱屈曲可動域(胸椎、腰椎、骨盤前傾)、ハムストリングス(大腿二頭筋長頭、半腱様筋、半膜様筋)の弾性率を条件の前後にそれぞれ測定した。その結果、ストレッチング介入条件では、FFDおよび骨盤前傾可動域がストレッチ後に有意に増大し、ハムストリングスの弾性率は、ストレッチング後に全ての筋で有意に低い値を示した。これらの結果から、FFDの増大および骨盤前傾可動域の増大は、ハムストリングスの弾性率低下に起因した可能性が示唆された。

剪断波エラストグラフィを用いた肩関節後方軟組織のタイトネスに対する有効なストレッチング肢位の検討

飯田尚哉, 谷口圭吾, 渡邉耕太, 宮本浩樹, 谷口達也, 藤宮峯子, 山下敏彦, 片寄正樹

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 93 ( 3 ) S649 - S649 2019年03月

足趾屈筋群の解剖学的付着部とその相互関係

廣田健斗, 上村杏菜, 渡邉耕太, 片寄正樹, 寺本篤史, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 93 ( 2 ) S153 - S153 2019年03月

Radius of curvature at the talocrural joint surface: inference of subject-specific kinematics.

Nozaki S, Watanabe K, Kato T, Miyakawa T, Kamiya T, Katayose M

Surgical and radiologic anatomy : SRA 41 ( 1 ) 53 - 64 2019年01月 [査読有り] [国際誌]

PURPOSE: The coupled behavior of talocrural joint motion is primarily determined by the morphological features of the talar trochlea and tibiofibular mortise. Features of the radius of curvature of the talocrural joint, however, remain unclear. The objectives of this study were to evaluate the radius of curvature at the mid, medial, and lateral regions of both the talar trochlea and the tibial plafond, and to estimate subject-specific kinematics of the talocrural joint. METHODS: Computed tomography images of 44 subjects with healthy talocrural joints were assessed by creating three-dimensional bone models. The radii of curvature of the anterior and posterior regions at the mid, medial, and lateral regions of both the talar trochlea and the tibial plafond were calculated. Hypothetical dorsiflexion and plantarflexion axes of the talocrural joint were estimated from the shape of the talar trochlea. Orientations and distances of these axes were calculated. RESULTS: At both the talar trochlea and the tibial plafond, the anteromedial and posteromedial radii exhibited the largest coefficients of variation. The anterior-to-posterior radius ratio (APRR) of the medial talar trochlea significantly correlated with the mid APRR, anterior medial-to-lateral radius ratio (MLRR), and posterior MLRR of the trochlea (r = 0.45, 0.52, - 0.60, respectively, and all P < 0.01). CONCLUSIONS: The asymmetric shape of the medial talar trochlea seems to determine a fixed or changing axis of rotation at the talocrural joint. This subject-specific rotational axis of the talocrural joint should be considered in the management of patients with ankle injuries.

DOI PubMed

Medical services at the 2017 Sapporo Asian winter games: injury and illness epidemiology at a 34-nation multisport event.

Kota Watanabe, Takao Akama, Shin Asakawa, Kimitaka Fukuda, Hiroya Sakai, Toru Okuwaki, Tomohito Imai, Hiroko Sato, Masaki Katayose, Manikavasagam Jegathesan, Nadia Al Shamali

British journal of sports medicine 53 ( 1 ) 32 - 36 2019年01月 [国際誌]

OBJECTIVES: We describe the medical services provided and report the injuries and illnesses that occurred at the eighth Asian Winter Games 2017. METHODS: A total of 2010 athletes and team officials from 32 National Olympic Committees and 2 guest countries attended this event; medical services were provided for 16 days. Medical data (medical care and physiotherapy) were collected for the same period by the organising committee for athletes and non-athletes (team officials, workforce, media and spectators) and recorded on the electronic medical record system at the medical rooms in the venues and the team residences. RESULTS: We recorded 745 medical encounters (medical care, 443; physiotherapy, 302), of which 549 (74%) were among athletes. There were 214 injuries as well as 144 illnesses and other medical conditions. Of the 1164 athletes, 549 (47%) utilised the services. Ice hockey, snowboarding and alpine skiing had high rate of medical encounters. More than half of the delegations were not accompanied by team doctor, and rate of medical encounters was high in these teams. The vast majority of patients transferred to hospital for further care were mostly athletes (n=36 out of 41), mostly alpine skiers and ice hockey players. CONCLUSION: Injuries and illnesses varied depending on NOC medical staffing and sport events. These data will serve organisers of medical and physiotherapy services in the Asian Winter Games and similar large events.

DOI PubMed

肩関節後方関節包のタイトネスに対する有効なストレッチング肢位の検討未固定標本と剪断波エラストグラフィを用いた研究

飯田尚哉, 谷口圭吾, 渡邉耕太, 片寄正樹, 宮本浩樹, 谷口達也, 藤宮峯子, 山下敏彦

北海道整形災害外科学会雑誌 ( 北海道整形災害外科学会 ) 61 ( 136th suppl ) 90 - 90 2019年

男女サッカー選手における利き脚・非利き脚による着地動作制御戦略の特徴

青木信裕, 小笠原一生, 片寄正樹

理学療法学Supplement ( 公益社団法人日本理学療法士協会 ) 46 ( 0 ) F - 91-F-91 2019年

【はじめに】

サッカーにおける膝前十字靭帯損傷は着地動作時に多発しており，非接触型損傷では男性は利き脚，女性は非利き脚に発生する割合が高いとの報告がある。しかし，動作時の運動力学について左右差を検討している研究は少なく，受傷側の性差が生まれる要因も明らかとなっていない。運動力学の指標の一つである床反力鉛直成分は高い個人特異性を示し，動的バランスを評価できることが示唆されている。本研究では，サッカー選手における着地時の運動力学の性差・左右差を明らかにすることを目的とした。

【方法】

男女サッカー選手を対象とし，利き脚はボールを蹴る脚と定義した。動作課題は20cm台からの前方及び側方への片脚ドロップジャンプ着地とした。計測された床反力鉛直成分から，床反力最大値到達時間（Peak Time）と床反力最大値（Peak Force）を算出し，性別と測定脚を要因とした二元配置分散分析を行った。

【倫理的配慮】

ヘルシンキ宣言に基づき被験者には書面を用いて十分な説明を行い，同意の得られた場合のみ測定を実施した。

【結果】

前方ジャンプでは性差・左右差はなかった。側方ジャンプでは交互作用がみられ，Peak Timeは非利き脚において男性よりも女性の方が短くなり，Peak Forceは女性において利き脚よりも非利き脚で大きくなった。

【考察】

女性でのみ左右差が生じた理由として，女性は男性よりも着地に関する能力が低く，左右差を他の機能で補完できていない可能性がある。

DOI CiNii

Comparison of the scapulohumeral rhythm of scapular tilt between the coronal, sagittal and scapular planes during humeral elevation

Yuki Nomura, Hajime Toda, Masaki Katayose

Rigakuryoho Kagaku ( Society of Physical Therapy Science (Rigaku Ryoho Kagakugakkai) ) 34 ( 2 ) 193 - 197 2019年

[Purpose] The purpose of this study was to investigate the effects of the plane of arm elevation on the scapulohumeral rhythm of scapular tilt in healthy persons. [Participants and Methods] An optical motion tracking system and acromion marker cluster were used to assess the scapulohumeral rhythm of scapular tilt in the coronal, sagittal and scapular planes during elevation of the arm of fourteen healthy male college students. [Results] The scapulohumeral rhythm of scapular tilt was 1.9 ± 0.4:1 for abduction, 1.8 ± 0.5:1 for scaption, and 1.8 ± 0.4:1 for flexion. During the arm elevation phase, the plane of arm elevation didn’t affect the scapulohumeral rhythm of scapular tilt. [Conclusion] Regardless of the plane of arm elevation, it is possible to use the 2:1 ratio of scapulohumeral rhythm of scapular tilt as a clinical indicator.

DOI

肩関節後下方関節包の組織弾性と受動張力の関係未固定凍結人体標本を用いた検討

飯田尚哉, 谷口圭吾, 渡邉耕太, 宮本浩樹, 谷口達也, 藤宮峯子, 片寄正樹

日本基礎理学療法学雑誌 ( 日本基礎理学療法学雑誌編集委員会 ) 21 ( 1 ) 88 - 94 2018年12月

組織の性状特性が生体とほぼ同等である未固定凍結人体標本6体6肩を対象とし、超音波剪断波エラストグラフィ法により計測した肩関節後下方関節包の組織弾性と受動張力との関係を検証した。本研究では、肩関節運動中の上腕骨頭異常偏位と関連が深い後方関節包の下部のみをデータ計測の対象とした。6標本すべてにおいて回帰式は有意で、受動張力と剪断弾性率の間には正の相関関係を認めた。全6標本の回帰式の決定係数R2は0.933±0.030であった。また、漸増負荷課題中に100gの受動張力で計測した剪断弾性率(87.5±37.5kPa)と全負荷での計測終了後に100gの受動張力で再計測した剪断弾性率(98.9±37.0kPa)に有意差はなかった。すべての受動張力の弾性計測において級内相関係数(ICC(1,3))は高く、平均すると0.994であった。

Segmental Lordosis of the Spondylolytic Vertebrae in Adolescent Lumbar Spondylolysis: Differences between Bilateral L5 and L4 Spondylolysis.

Kazuhiro Sugawara, Noriyuki Iesato, Masaki Katayose

Asian spine journal 12 ( 6 ) 1037 - 1042 2018年12月 [国際誌]

STUDY DESIGN: Retrospective study. PURPOSE: This study aimed to investigate whether segmental lumbar hyperlordosis of the affected vertebra in patients with spondylolysis occurs only at L5 or also occurs at L4. OVERVIEW OF LITERATURE: To the best of our knowledge, increase in segmental lordosis of the spondylolytic vertebrae has only been investigated in bilateral L5 spondylolysis; it has not been examined at different levels of bilateral spondylolysis. According to the characteristics of segmental lordosis in bilateral L5 spondylolysis, patients with bilateral L4 spondylolysis may also have increased segmental lordosis of the L4 vertebra. METHODS: Patients with bilateral spondylolysis of the L5 or L4 vertebra in 2013-2015 were retrospectively identified from the hospital database. Standing lateral lumbar radiographs were assessed for the angle of segmental lordosis of the L5 and L4 vertebra, sacral slope, and lumbar lordosis. The differences in segmental lordosis of the L5 and L4 vertebra, sacral slope, and lumbar lordosis were determined using non-paired Student t-test. RESULTS: Overall, 15 cases of bilateral L4 spondylolysis and 41 cases of bilateral L5 spondylolysis satisfied the inclusion and exclusion criteria. Lordosis of the L4 vertebra was significantly greater in the bilateral L4 spondylolysis group (24.2°±7.0°) than that in the L5 spondylolysis group (20.3°±6.1°, p=0.047). Lordosis of the L5 vertebra was significantly lower in the L4 spondylolysis group (27.7°±8.2°) than that in the L5 spondylolysis group (32.5°±7.3°, p=0.040). The sacral slope and lumbar lordosis did not significantly differ between the groups. CONCLUSIONS: Adolescent patients with bilateral spondylolysis have segmental hyperlordosis of the affected vertebra not only at the L5 level but also at the L4 level.

DOI PubMed

INTRA-RATER AND INTER-RATER RELIABILITY STUDY OF A MEASUREMENT METHOD FOR THE PATHWAY OF THE SUPRASPINATUS INTRAMUSCULAR TENDON BY 3.0 TESLA MRI IMAGES: THE SHEAR FORCE ANGLE ANTERIOR POSTERIOR

Youhei Kanno, Hajime Toda, Tsutomu Horiuchi, Masaki Katayose

Journal of Musculoskeletal Research 2018年12月 [査読有り]

慢性足関節不安定症における足関節底屈筋力と腓腹筋弾性の特徴

小林匠, 谷口圭吾, 近藤湧, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 26 ( 4 ) S151 - S151 2018年11月

Correction: Acute Effect of Active and Passive Static Stretching on Elastic Modulus of the Hamstrings.

Gakuto Nakao, Keigo Taniguchi, Masaki Katayose

Sports medicine international open 2 ( 6 ) E200 2018年11月 [国際誌]

DOI PubMed

Acute Effect of Active and Passive Static Stretching on Elastic Modulus of the Hamstrings.

Gakuto Nakao, Keigo Taniguchi, Masaki Katayose

Sports medicine international open 2 ( 6 ) E163-E170 2018年11月 [国際誌]

The purpose of this study was to investigate differences in the acute effects of passive knee extension (PKE) and active knee extension (AKE) stretching on the shear elastic modulus of the hamstrings. In 20 healthy men, maximum knee extension (maximum range of motion [ROM]) and shear elastic modulus of the hamstrings (biceps femoris long head, semitendinosus, semimembranosus) were measured before (Pre) and after (Post) AKE and PKE stretching. The maximum ROM during stretching was measured. In both stretching methods, maximum ROM increased and the shear elastic modulus decreased (p<0.01), but no difference was found between the procedures. No significant difference was observed in the maximum ROM during stretching between the procedures (p=0.06). The shear elastic modulus was significantly lower in the biceps femoris long head and semimembranosus than in the semitendinosus muscle (p<0.05). Static stretching with PKE and AKE stretching showed an increase in maximum ROM and a decrease in hamstring elasticity, but no difference was found between the methods. Both stretching protocols were effective for reducing elasticity of the biceps femoris long head and semimembranosus.

DOI PubMed

Kinematic analysis of the ankle joint on the side-hop test in subjects with ankle sprains

Masahiro Yoshida, Nobuhiro Aoki, Keigo Taniguchi, Makoto Yoshida, Masaki Katayose

Translational Sports Medicine ( Wiley ) 1 ( 6 ) 265 - 272 2018年11月 [査読有り]

The side-hop test (SHT) is useful functional performance test for ankle sprain. However, few research exists to investigate the relationship between the SHT and functional deficit in ankle. The objective of this study was to establish SHT as an evaluation criterion of functional deficits in ankle sprain. Twenty-seven subjects with a history of ankle sprain participated. The time taken to perform SHT in the uninjured and injured limbs was measured. The angular displacements of the ankle joint were measured using the 3D motion analysis system. The muscle activities of the peroneus longus muscle (PL), tibialis anterior muscle (TA), and the medial and lateral gastrocnemius muscles (GM, GL) were measured using surface EMG. The time of SHT in the injured limb (9.22 +/- 1.19 seconds) was significantly longer than that in the uninjured limb (8.71 +/- 0.99 seconds). The range of the ankle inversion/eversion and dorsal flexion/plantar flexion in the injured limb was significantly greater than that in the uninjured limb. The injured limb showed a significant decrease in PL, TA, and GM integral EMG during SHT. Ankle motion and muscle activity caused the decline in SHT time in patients with injured limb.

DOI

肩甲骨面外転運動に伴う棘上筋の弾性変化に及ぼす腱板断裂の影響

榊善成, 谷口圭吾, 佐藤史子, 及川直樹, 阿部真行, 倉秀治, 片寄正樹, 岡村健司

日本肩関節学会抄録集 ( (一社)日本肩関節学会 ) 45回 307 - 307 2018年09月 [査読有り]

札幌医科大学附属病院理学療法士・作業療法士研修センターにおける内部障害系専門研修プログラムの成果と課題

片野唆敏, 橋本暁佳, 柿澤雅史, 片寄正樹

日本心臓病学会学術集会抄録 ( (一社)日本心臓病学会 ) 66回 CS4 - 5 2018年09月

肩関節後方関節包のスティフネスと受動張力の関係未固定凍結人体標本を用いた検討

飯田尚哉, 谷口圭吾, 渡邉耕太, 宮本浩樹, 谷口達也, 十文字駿起, 藤宮峯子, 寺本篤史, 山下敏彦, 片寄正樹

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 92 ( 8 ) S1728 - S1728 2018年08月

肩甲骨面外転保持運動に伴う棘上筋の弾性変化に及ぼす腱板断裂の影響

榊善成, 谷口圭吾, 佐藤史子, 及川直樹, 仙葉翔登, 冨田悠平, 越前谷渓, 宮塚智也, 阿部真行, 金谷耕平, 倉秀治, 片寄正樹, 岡村健司

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 30回 126 - 126 2018年07月 [査読有り]

肩関節後方筋における受動的な弾性特性評価未固定凍結人体標本を用いた検討

飯田尚哉, 谷口圭吾, 渡邉耕太, 宮本浩樹, 谷口達也, 藤宮峯子, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 30回 93 - 93 2018年07月

長母趾屈筋の機能 FHL分枝テストの開発

廣田健斗, 渡邉耕太, 齋藤悠城, 片寄正樹, 寺本篤史, 山下敏彦

整形・災害外科 ( 金原出版(株) ) 61 ( 7 ) 861 - 868 2018年06月

＜文献概要＞生体において長母趾屈筋(FHL)分枝パターンを判別するテスト方法を考案し,その妥当性を検討した。本テストは足関節中間位にて母趾趾節間関節の自動屈曲運動を行わせ,同時に屈曲した足趾を記録する方法である。1)機能解剖学的検証:Thiel法固定足標本6肢を用いた。FHL,長趾屈筋(FDL)をそれぞれ牽引し,各趾末節骨に挿入した鋼線の屈曲角度変化量を算出し,その後,FHLの分枝を肉眼的に観察した。2)生体による検証:健常男性4名に対しワイヤー電極を介してFHLを電気刺激し,電気刺激による屈曲趾とFHL分枝テストの一致度を評価した。1)FHL分枝の付着する足趾では,FHL牽引時の足趾屈曲角度変化量がFDL牽引時と同等であった。2)電気刺激による屈曲趾とFHL分枝テスト中に屈曲した足趾は全被験者で一致していた。FHLの収縮時にはFHL分枝が付着する足趾も十分に屈曲することが示された。今回考案したテストはFHLの分枝判別に利用できると考えられた。

A Multi-modality Approach Towards Elucidation of the Mechanism for Human Achilles Tendon Bending During Passive Ankle Rotation.

Ryuta Kinugasa, Keigo Taniguchi, Naoto Yamamura, Mineko Fujimiya, Masaki Katayose, Shu Takagi, V. Reggie Edgerton, Shantanu Sinha

Scientific Reports 8 ( 1 ) 4319 - 4319 2018年03月 [査読有り] [国際誌]

The in vitro unconstrained Achilles tendon is nearly straight, while in vivo experiments reveal that the proximal region of the Achilles tendon, adjacent to Kager's fat pad, bends ventrally during plantarflexion but remains nearly straight during dorsiflexion. Tendon bending is an important factor in determining the displacement of the foot compared to the shortening of the muscle fibers. The objective of this study was to elucidate the various mechanisms that could cause tendon bending, which currently remain unknown. Examination of Thiel-embalmed cadavers, with preservation of native articular joint mobility, revealed that the Achilles tendon still bent ventrally even when its surrounding tissues, including the skin surface, Kager's fat pad, and distal portions of the soleus muscle were removed. Shear modulus and collagen fiber orientation were distributed homogeneously with respect to the longitudinal line of the tendon, minimizing their causative contributions to the bending. Given that tendon bending is not caused by either the nature of the deformations of the tissues surrounding the Achilles tendon or its physical properties, we conclude that it results from the geometric architecture of the Achilles tendon and its configuration with respect to the surrounding tissues.

DOI PubMed

アーチサポートが立位での足趾屈曲力に与える影響

廣田健斗, 渡邉耕太, 片寄正樹, 寺本篤史, 山下敏彦

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 26 ( 1 ) 109 - 114 2018年01月

【はじめに】足趾の屈曲機能は足部の安定化やスポーツパフォーマンスに重要であることが知られている。足内側縦アーチ低下や足部障害をきたした選手に、アーチサポートを処方することは一般的である。しかしアーチサポートによる足趾機能への影響は不明である。そこで本研究の目的は、内側縦アーチのアーチサポートが立位での足趾屈曲力に影響するかを検討することとした。【方法】6名の健常男性を対象とした(平均21歳)。測定条件:肢位は静止立位とし、全足趾同時に最大努力での足趾屈曲運動を5秒間行った。使用したアーチサポートは高さ5mmで、内側縦アーチ下に挿入した。評価項目:足アーチ形状評価にはアーチ高比を用い、アーチ高を切頂足長で除した値とした。足趾屈曲力は足圧分布測定システム(ニッタ株式会社、F-スキャン)にて計測した。データ解析:アーチサポート有無の2条件間で足趾屈曲力を比較した。統計学的解析は対応のあるt検定を用いた(p<0.05)。【結果】アーチ高比の値はローアーチ〜正常の範囲であった(平均0.331±0.019)。足趾屈曲力はアーチサポート無し条件で8.26±1.86kg、アーチサポート有り条件で9.20±2.03kgであり、両群間で有意差を認めた(p=0.004)。【考察】アーチサポートによる足趾屈曲力の向上には、内側縦アーチの支持性向上や足内在筋の圧迫、バランス機能の改善が関与したと考えた。アーチサポートの有効性には、足趾屈曲力向上もかかわっている可能性が示唆された。(著者抄録)

新たな足関節底屈筋力評価法の信頼性と有用性

小林匠, 野宮杏奈, 谷口圭吾, 片寄正樹

日本アスレティックトレーニング学会誌 4 ( 1 ) 2018年 [査読有り]

Estimation of quadriceps femoris muscle dysfunction in the early period after surgery of the knee joint using shear-wave elastography.

Makoto Kawai, Keigo Taniguchi, Tomoyuki Suzuki, Masaki Katayose

BMJ open sport & exercise medicine 4 ( 1 ) e000381 2018年 [国際誌]

OBJECTIVES: Orthopaedic surgery of the knee joint results in functional deterioration of the quadriceps femoris muscle. However, little is known about quadriceps femoris muscle dysfunction in the early postsurgical period. Therefore, we examined the stiffness of the quadriceps femoris muscle in the early postsurgical period. METHODS: Seven patients and seven healthy controls performed quadriceps contraction exercises. In resting and contraction conditions, the shear modulus, muscle thickness and pennation angle were measured for the vastus medialis (VM), vastus lateralis (VL) and the rectus femoris (RF) using ultrasound elastography. RESULTS: The shear moduli of the VM, VL and RF in the control group did not significantly interact, while the shear moduli in the patient group did show a significant interaction. In the resting condition, there was no difference between the unaffected and affected sides in the patient group, but the shear moduli of the VM and VL in the contraction condition was significantly lower on the affected side than the unaffected side.The contraction ratios between muscles by limbs did not significantly interact. However, there were main effects due to muscle and limb factors. The VM and VL had a significantly higher contraction ratio than the RF, and the control and unaffected limbs had a higher contraction ratio than the affected limb. CONCLUSION: The results demonstrated a decrease in muscle stiffness during contraction in patients with quadriceps femoris dysfunction. Measurement of the shear modulus has potential as a new evaluation index and with high sensitivity to decreases in muscle contraction.

DOI PubMed

外側方向の片脚ホップ動作における足関節捻挫群の足関節角度の特徴

吉田昌弘, 吉田真, 片寄正樹

日本アスレティックトレーニング学会誌 3 ( 1 ) 39 - 44 2017年12月 [査読有り]

Muscular responses appear to be associated with existence of kinesthetic perception during combination of tendon co-vibration and motor imagery

Eriko Shibata, Fuminari Kaneko, Masaki Katayose

EXPERIMENTAL BRAIN RESEARCH ( SPRINGER ) 235 ( 11 ) 3417 - 3425 2017年11月 [査読有り]

The afferent inputs from peripheral sensory receptors and efferent signals from the central nervous system that underlie intentional movement can contribute to kinesthetic perception. Previous studies have revealed that tendon vibration to wrist muscles elicits an excitatory response-known as the antagonist vibratory response-in muscles antagonistic to the vibrated muscles. Therefore, the present study aimed to further investigate the effect of tendon vibration combined with motor imagery on kinesthetic perception and muscular activation. Two vibrators were applied to the tendons of the left flexor carpi radialis and extensor carpi radialis. When the vibration frequency was the same between flexors and extensors, no participant perceived movement and no muscle activity was induced. When participants imagined flexing their wrists during tendon vibration, the velocity of perceptual flexion movement increased. Furthermore, muscle activity of the flexor increased only during motor imagery. These results demonstrate that kinesthetic perception can be induced during the combination of motor imagery and co-vibration, even with no experience of kinesthetic perception from an afferent input with co-vibration at the same frequency. Although motor responses were observed during combined co-vibration and motor imagery, no such motor responses were recorded during either co-vibration alone or motor imagery alone, suggesting that muscular responses during the combined condition are associated with kinesthetic perception. Thus, the present findings indicate that kinesthetic perception is influenced by the interaction between afferent input from muscle spindles and the efferent signals that underlie intentional movement. We propose that the physiological behavior resulting from kinesthetic perception affects the process of modifying agonist muscle activity, which will be investigated in a future study.

DOI

Three-dimensional morphometric analysis of the talus: implication for variations in kinematics of the subtalar joint.

Nozaki S, Watanabe K, Katayose M

Surgical and radiologic anatomy : SRA 39 ( 10 ) 1097 - 1106 2017年10月 [査読有り] [国際誌]

PURPOSE: Three-dimensional (3D) movement of the clinical subtalar joint (CSTJ) is primarily determined by the morphology of the articular surfaces of the talus. The purposes of this study were to assess the 3D orientation of the CSTJ facets of the talus and the talar head and to determine the tri-axial angular relationship. METHODS: Fifty dry tali were scanned using computed tomography to create a 3D bone model of the talus. The tri-axial angles of the anterior, middle, and posterior facets and the talar head were calculated. A correlation analysis between the angles of the posterior facet and the talar head was also performed. RESULTS: The transverse angle at both the posterior facet and the talar head was significantly correlated with the sagittal angle (r = -0.441, p < 0.001; and r = -0.694, p < 0.001, respectively). The sagittal angle of the posterior facet was significantly correlated with that of the talar head (r = 0.478, p < 0.001). CONCLUSIONS: When the posterior facet of the talus and the talar head exhibits a greater downward and lesser medial orientation, a greater inversion/eversion at the CSTJ should be induced, while an opposite orientation should induce greater plantarflexion/dorsiflexion and medial/lateral rotation at the CSTJ. Our findings will be useful for planning rehabilitation programs and surgical interventions to correct the subtalar joint orientation in clinical settings.

DOI PubMed

アキレス腱縫合術後症例における筋・腱組織の機械的特性および足関節の力学特性の経時変化

河合誠, 谷口圭吾, 加藤拓也, 寺本篤史, 鈴木智之, 小路弘晃, 渡邉耕太, 片寄正樹, 山下敏彦

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 37 ( 4 ) 455 - 455 2017年08月

急性の電気刺激が血流依存性の血管調節機能に与える影響

大岩正太郎, 岩本えりか, 長岡凌平, 伊藤翔太, 高見次郎, 根木亨, 片寄正樹

理学療法科学 ( (一社)理学療法科学学会 ) 32 ( 2 ) 249 - 254 2017年04月

[目的]血管内皮機能の指標である血流依存性血管拡張反応(以下、FMD)および低血流依存性血管収縮反応(以下、L-FMC)に着目し、急性的な電気刺激が血流依存性の血管調節機能に与える影響を明らかにすることを目的とした。[対象と方法]健常成人男性8名。被験者の右前腕に対して30分間の電気刺激介入を行い、介入前後で右上腕動脈のFMDおよびL-FMCを測定し、介入前後で比較した。[結果]FMDとL-FMCは介入により増加を示したが有意差は認めなかった。一方、FMD+L-FMCは介入前と比較して介入後に有意に増加を示した。[結語]急性的な筋への電気刺激は血流依存性の血管収縮・拡張能に影響を与える可能性があるが、今後電気刺激の設定について更なる検討が必要である。(著者抄録)

棘上筋腱断裂症例における肩関節周囲筋の筋活動の特徴

榊善成, 山崎肇, 及川直樹, 佐藤史子, 内山英一, 倉秀治, 片寄正樹, 山下敏彦, 岡村健司

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 91 ( 2 ) S292 - S292 2017年03月 [査読有り]

Thiel法固定足標本を用いた足趾屈曲筋牽引時の足趾屈曲角度変化

廣田健斗, 渡邉耕太, 齋藤悠城, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 91 ( 3 ) S978 - S978 2017年03月

足関節底屈角度変化が下腿三頭筋の動的筋弾性に及ぼす影響

小林匠, 谷口圭吾, 加藤拓也, 金谷耕平, 片寄正樹

日本整形外科超音波学会会誌 ( 日本整形外科超音波学会 ) 28 ( 1 ) 56 - 61 2017年03月 [査読有り]

若年健常成人男性7名7足(平均23.0±2.0歳)を対象とした。股関節・膝関節伸展位で自動足関節底屈可動域を測定した。筋スティフネスは剪断弾性係数に基づいて評価した。剪断弾性係数はリニアプローブおよび超音波剪断波エラストグラフィ技術搭載の装置を用いて測定した。被検筋は腓腹筋外側頭(LG)およびヒラメ筋(SOL)とした。最大自動足関節底屈角度は、50〜65°(58.6±4.8°)であった。安静時筋スティフネスは角度に主効果を認め、底屈0%と比べて底屈100%で有意に筋スティフネスは減少したが、交互作用はなかった。最大随意収縮時の動的な筋スティフネスには交互作用を認めた。LGは底屈角度の増加に伴い有意に減少したが、SOLは底屈角度間で有意差を認めなかった。底屈0・50%ではLGはSOLより有意に高かったが、底屈100%では筋間に有意差を認めなかった。足関節底屈ピークトルク値は角度に主効果を認め、底屈角度の減少に伴い有意に減少したが、交互作用はなかった。

関節窩面に対する肩回旋筋腱板筋群の筋内腱の走行における健常成人の利き手・非利き手の比較

戸田創, 菅野洋平, 片寄正樹

札幌保健科学雑誌 ( 札幌医科大学 ) 6 ( 6 ) 7 - 13 2017年 [査読有り]

(目的)本研究は肩甲骨を直上から観察した際の回施筋腱板筋群の筋内腱の走行と関節窟面の成す角（Shear Force Angle Anterior-Posterior、以下SFA-AP）の健常成人における利き手??非利き手の比較をすることを目的とした。（方法）オーバーヘッドアスリートでない健常男性15名30肩を対象とした。3 Dimensional （以下3D）MRIを用いて肩甲骨全形・上腕骨近位と棘上筋、棘下筋、小円筋、肩甲下筋の筋内腱を領域選択し、肩甲骨および筋内腱の3D形態を描出し、4筋それぞれのSFA-APを計測した。各筋における利き手と非利き手の比較にPaired T-testを用いた（p<0.05）。（結果）4筋それぞれのSFA-APは利き手/非利き手の順で棘上筋が7.3±3.3/6.7±3.5、棘下筋が2.9±4.0/1.5±3.0、小円筋が7.0±3.9/6.4±3.5、肩甲下筋が13.0±2.6/13.1±2.7であった。各筋の利き手/非利き手の間で有意差は認められなかった。（結語）日常生活での上肢使用頻度の違いは腱板筋群の前後方向の向きには影響しないことが示された。

DOI CiNii

坐骨神経の深度が経皮的磁気刺激による誘発収縮力に及ぼす影響

青木信裕, 片寄正樹

理学療法学Supplement ( 公益社団法人日本理学療法士協会 ) 2016 497 - 497 2017年

【はじめに，目的】膝関節屈筋は坐骨神経支配であり，電気刺激を用いて坐骨神経を介した最大張力の測定が困難である。我々は磁気刺激によって坐骨神経を刺激し，膝関節屈曲力を誘発する試みを行っている。これまでに磁気刺激によって坐骨神経の最大上刺激ができる対象者とできない対象者が存在することを報告した。磁気刺激は対象までの距離が結果に影響を及ぼすため，刺激部位における坐骨神経の走行と磁気刺激によって得られる誘発収縮力には関係性がある可能性がある。本研究では，殿部での坐骨神経の深度が，経皮的磁気刺激によって誘発される収縮力に及ぼす影響を明らかにすることを目的とした。

【方法】健康な成人男性に対して左殿部に経皮的に磁気刺激を行った。磁気刺激は大型円形コイルを磁気刺激装置に接続し，コイル辺縁を刺激部位上に配置して実施した。被験者の姿勢は，ベッド上で股関節，膝関節を屈曲90°とした四つ這い位となり，腹部に台を入れて支持した肢位とした。左殿部を磁気刺激部位とし，坐骨結節と大腿骨大転子を指標に15mm間隔で格子を作成し，絶対座標系を定義した。経皮的磁気刺激は，直径20cmの大型円形コイルを磁気刺激装置に接続し，コイル辺縁を刺激部位上に配置し，末梢方向に誘導電流を流した。刺激部位・条件の決定は我々が報告した方法で実施した。磁気刺激によって誘発される膝関節屈曲力が最大となる刺激部位を探索し，得られた屈曲力を誘発収縮力とした。その後，超音波画像診断装置を用いて刺激部位の坐骨神経を撮像し，体表からの深度を計測した。坐骨神経の深度と得られた誘発収縮力について相関関係を求めた。

【結果】坐骨神経の深度と誘発収縮力の間には，有意な負の相関関係があった。

【結論】磁気刺激を用いた坐骨神経刺激では，対象者の坐骨神経の深度を確認することで最大上刺激できる対象者を推定できる可能性がある。

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選択的筋疲労条件を用いた走行遊脚期後半におけるハムストリングの脚振り出し制動機能の探索

宮崎輝光, 青木信裕, 片寄正樹

理学療法科学 ( 理学療法科学学会 ) 32 ( 5 ) 639 - 643 2017年

〔目的〕選択的筋疲労条件を用いて，走行遊脚期後半における脚振り出し制動機能を半腱様筋と大腿二頭筋が有しているかを検証することを目的とした．〔対象と方法〕7人の健康な成人男性を対象とした．半腱様筋と大腿二頭筋に対する選択的筋疲労介入前後に走行課題を実施した．筋疲労の検証のため，随意収縮課題中の関節トルクと筋電図中央周波数を算出した．走行課題では，遊脚期後半における膝・股関節屈曲角度，膝関節伸展角速度を算出した．〔結果〕選択的筋疲労は各対象筋のみが有意に低下した．走行課題の算出項目は，筋疲労前後で有意な変化はなかった．〔結語〕半腱様筋と大腿二頭筋は，個別の機能として脚振り出し制動機能を有さない可能性がある．

DOI CiNii

Three-Dimensional Analysis of Talar Trochlea Morphology: Implications for Subject-Specific Kinematics of the Talocrural Joint

Shuhei Nozaki, Kota Watanabe, Masaki Katayose

CLINICAL ANATOMY ( WILEY-BLACKWELL ) 29 ( 8 ) 1066 - 1074 2016年11月 [査読有り]

Three-dimensional 93D) behavior of the talocrural joint is primarily determined by the articular surface morphology of the talar trochlea and tibiofibular mortise. However, morphological features of the anterior and posterior regions of the talar trochlea remain unclear. The objectives of this study were to evaluate anterior and posterior radii of the medial and lateral talar trochlea and to estimate subject-specific kinematics of the talocrural joint. Fifty dry tali were scanned using computed tomography to create 3D bone models. Radii of curvature of the anterior and posterior region at both the medial and lateral trochlea were calculated. Orientations of the dorsiflexion and plantarflexion axis passing through the centers of the circles fitted to the anterior region of the medial and lateral trochlea and through the centers of the circles fitted to the posterior region of the medial and lateral trochlea were evaluated, respectively. The anterior radius of the medial trochlea was significantly smaller than that of the lateral trochlea by a mean of 7.8 mm 9P< 0.001). The posterior radius of the medial trochlea was larger than that of lateral trochlea in 30 samples 960%) and vice versa in 20 samples 940%). Unilateral asymmetric shape of anterior trochlea would induce external rotation of the talus during ankle dorsiflexion, whereas bilateral asymmetric shape of posterior trochlea would induce opposite axial rotations among subjects during ankle plantarflexion, which would help the physical therapists to restore talocrural joint motions to ideal state for patients with ankle injuries. (C) 2016 Wiley Periodicals, Inc.

DOI PubMed

棘上筋断裂症例における肩関節周囲筋の筋活動の特徴

榊善成, 山崎肇, 及川直樹, 内山英一, 片寄正樹, 岡村健司

日本肩関節学会抄録集 ( (一社)日本肩関節学会 ) 43回 316 - 316 2016年09月 [査読有り]

新しいInternational Ankle Consortium基準を用いた慢性足関節不安定症の該当率とその特徴の検討

小林匠, 渡邉耕太, 片寄正樹, 山下敏彦

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 24 ( 2 ) 269 - 274 2016年04月

International Ankle Consortium(IAC)は2013年に慢性足関節不安定症(CAI)の選択基準を公表し、CAIの研究においては本基準を用いた対象の統一が期待される。本研究はIAC基準によるCAI該当率を調査し、その特徴を検討することを目的とした。医療系養成校学生325名を対象に本基準で調査した結果、CAI該当率は4.0-7.1%であり、推奨される3つの自覚的足関節不安定感調査間で該当率に有意差が認められた。性別およびスポーツ活動歴の有無でCAI該当率に有意差は認めなかった。IAC基準は今後の研究で用いられるべきだが、調査項目によって対象の範囲が異なる可能性があることに留意が必要と考えられた。(著者抄録)

半腱様筋の選択的筋疲労がハムストリング筋活動に及ぼす影響

青木信裕, 金子文成, 片寄正樹

札幌保健科学雑誌 ( 札幌医科大学保健医療学部 ) ( 5 ) 45 - 52 2016年03月

半腱様筋の選択的筋疲労がハムストリング筋活動に及ぼす影響について検討した。健康な成人男性13例(20〜23歳)を対象とした。実験は、運動課題を実施後に神経筋電気刺激(NMES)を30分間実施し、終了後に再度運動課題を実施した。電気刺激の前後の運動課題中の測定項目は、膝関節屈曲トルクとハムストリング筋活動から算出される筋電図積分値(iEMG)、中央周波数(MDF)とした。運動課題は、等尺性膝関節屈曲運動の最大随意収縮(MVC)課題と一定力出力課題とした。膝関節最大屈曲トルクは測定時期要因と膝関節屈曲角度要因の交互作用があった。一定力出力課題において、半腱様筋のiEMGは電気刺激後に有意に上昇し、MDFは有意に低下した。半膜様筋と大腿二頭筋のiEMGは電気刺激後に有意に上昇したが、MDFは変化しなかった。半腱様筋の選択的筋疲労によって最大屈曲トルクが低下したにも拘らず、協働筋である半膜様筋の最大随意収縮中における筋活動量は増大した。

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THE SKIN ACTS TO MAINTAIN MUSCLE SHEAR MODULUS

Yasuhide Yoshitake, Naokazu Miyamoto, Keigo Taniguchi, Masaki Katayose, Hiroaki Kanehisa

ULTRASOUND IN MEDICINE AND BIOLOGY ( ELSEVIER SCIENCE INC ) 42 ( 3 ) 674 - 682 2016年03月 [査読有り]

It is not clear how the tissues covering the skeletal muscles affect the muscles' mechanical properties. The main purpose of this study was to examine changes in muscle shear modulus as a representative mechanical property of muscle with and without the covering tissues of skin and epimysium (fascia). Shear modulus of the medial gastrocnemius (MG) muscle was determined using ultrasound shear-wave elastography in the Thiel's embalmed cadavers under three different conditions: original (intact cadavers), removal of the skin on the MG and subsequent removal of the epimysium. Muscle shear modulus significantly decreased by 50% after removal of the skin, whereas no additional changes in shear modulus were observed after subsequent removal of the epimysium. This study suggests that the skin is a main contributor for maintaining the muscle mechanical properties among tissues covering the skeletal muscle. (E-mail: y-yoshi@nifs-k.ac.jp) (C) 2016 World Federation for Ultrasound in Medicine & Biology.

DOI PubMed

超音波エラストグラフィによる筋硬度評価

谷口圭吾, 加藤拓也, 野崎修平, 河合誠, 片寄正樹, 山下敏彦

整形・災害外科 ( 金原出版 ) 59 ( 2 ) 211 - 215 2016年02月

DOI CiNii J-GLOBAL

新しい医療技術超音波エラストグラフィによる筋硬度評価

谷口圭吾, 加藤拓也, 野崎修平, 河合誠, 片寄正樹, 山下敏彦

整形・災害外科 ( 金原出版(株) ) 59 ( 2 ) 211 - 215 2016年02月

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Reliability and validity study of a measurement method for the glenoid version by a 3-dimensional bone model from 3.0 tesla MRI

Yohei Kanno, Hajime Toda, Tsutomu Horiuchi, Katsuaki Nagai, Masaki Katayose

Journal of Musculoskeletal Research 19 ( 3 ) 2016年 [査読有り]

DOI

The variation in the lumbar facet joint orientation in an adult Asian population and its relationship with the cross-sectional area of the multifidus and erector spinae

Kazuhiro Sugawara, Masaki Katayose, Kota Watanabe

Asian Spine Journal ( Korean Society of Spine Surgery ) 10 ( 5 ) 886 - 892 2016年 [査読有り]

Study Design: Cross-sectional study of healthy volunteers. Purpose: We aimed to investigate the variation in the lumbar facet joint orientation in an adult Asian population. The relationship between the facet joint orientation and muscle cross-sectional area (CSA) of multifidus and erector spinae was also clarified. Overview of Literature: Several studies have reported that lumbar pathologies, such as lumbar spondylolysis and degenerative spondylolisthesis, were related to the horizontally shaped lumbar facet joint orientation at the lower lumbar level. However, data regarding variations in the facet joint orientation in asymptomatic subjects have not been well documented. Methods: In 31 healthy male adult Asian volunteers, the facet joint orientation and CSA of multifidus and erector spinae were measured using magnetic resonance imaging at the L4-5 and L5-S1 levels. Variation in the facet joint orientation was examined using coefficients of variation (CV). Pearson's product-moment coefficient was used to investigate the relationship between the facet joint orientation and CSA of multifidus and erector spinae. Results: Lumbar facet joint orientation had a wider range of variation at L5-S1 (CV=0.30) than at L4-5 (CV=0.18). The L4-5 facet joint orientation had a weak but significant correlation with the CSA of erector spinae (r =0.40 p=0.031). The CSA of the multifidus had no relationship with the facet joint orientation at the L4-5 (r =0.19 p =0.314) and the L5-S1 level (r =0.19 p =0.312). Conclusions: The lumbar facet joint orientation was found to have a wide variation, particularly at the L5-S1 in the Asian adult population, and the facet joint orientation had a relationship with the CSA of the erector spinae at the L4-5.

DOI

健常成人における両肩峰間距離に対する鎖骨長の割合と安静立位での肩甲骨アライメントの関係

戸田創, 山本敬三, 吉田真, 片寄正樹

札幌保健科学雑誌 ( 札幌医科大学 ) 5 ( 5 ) 19 - 26 2016年 [査読有り]

（目的）両肩峰間距離に対する鎖骨長の割合と安静立位での肩甲骨アライメントとの関係を検討すること。（方法）健常男性30名の60肩を対象とした。鎖骨長及び両肩峰間距離と安静立位での肩甲骨アライメントをそれぞれ測定した。鎖骨長及び両肩峰間距離の測定にはメジャーを使用し、肩甲骨アライメントの測定には三次元動作解析装置を使用した。両肩峰間距離に対する鎖骨長の割合（以下、鎖骨長/両肩峰間距離）と肩甲骨アライメントを表す5項目1拳上2後退3上方回旋4後傾5内錠を解析に用いた。鎖骨長/両肩峰間距離と安静立位での肩甲骨アライメントとの関係の検討にPearsonの相関係数を用い、有意水準をp<0.05とした。（結果）鎖骨長/両肩峰間距離と後退（r=0.55,R=0.30,p<.001）および内旋（r=0.59,R=0.35,p<.001）で弱い相関関係を認めた。（結論）安静立位での肩甲骨アライメントを評価する際は両肩峰間距離に対する鎖骨長の割合の影響を考慮する必要がある事が示唆された。

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等速性股関節屈曲・伸展運動時における長内転筋，大内転筋の筋活動と股関節角度の関係

加藤拓也, 谷口圭吾, 池田祐真, 本村遼介, 片寄正樹

日本基礎理学療法学雑誌 19 ( 2 ) 59 - 67 2016年 [査読有り]

健常成人における関節窩面に対する棘上筋筋内腱の走行に加齢変化が及ぼす影響

戸田創, 菅野洋平, 片寄正樹

臨床バイオメカニクス ( 日本臨床バイオメカニクス学会 ) 36 1 - 6 2015年10月

健常成人における関節窩面に対する棘上筋筋内腱の走行に加齢変化が及ぼす影響について検討した。健常男性15例の両側30肩を対象とした。MRI DICOMデータをAze Virtual Placeに読み込み肩甲骨および上腕骨、棘上筋筋内腱のみの形状抽出DICOMを作成した。次に形態抽出DICOMをOsiriXに読み込み3D骨・筋内腱モデルを作成した。棘上筋SFA-APは20歳代9.53±1.62°、30歳代6.94±3.65°、40歳代4.57±3.02°であった。一元配置分散分析の主効果を認め、多重比較により40歳代は20歳代と比較して有意に小さかった。40歳代と20歳代の平均の差は4.96°であり、MDCの1.46°より大きい値を示した。関節窩傾斜角のみ20歳代と30歳代で有意差を認めた。多重比較が棘上筋SFA-APで差を認めた20歳代と40歳代の間では有意差を認めなかった。

CiNii

健常成人男性における体幹屈曲伸展時における胸腰椎の運動学的解析

山根裕司, 菅原一博, 盛智子, 青木信裕, 谷口圭吾, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 23 ( 4 ) S258 - S258 2015年10月

スクワット動作における中間広筋の活動特性

河合誠, 谷口圭吾, 齋藤輝, 秋間広, 片寄正樹

日本基礎理学療法学雑誌 ( 日本基礎理学療法学会学術誌局 ) 18 ( 2 ) 61 - 69 2015年08月

スクワット動作における中間広筋の活動特性について検討した。健常男性15例を対象とした。各筋とも膝伸展域では筋活動が小さく、屈曲に伴い増大する傾向がみられた。スクワット動作の各速度条件における大腿四頭筋の膝関節角度-筋電図では、各速度条件において有意な交互作を認めた。直立姿勢から膝関節屈曲90°までしゃがみ込むECC phaseにおいて交互作用(筋×速度)および主効果(速度)は認めなかった。直立姿勢まで立ち上がるCON phaseでは交互作用(筋×速度)は認めなかったが、有意な主効果(速度)を認めた。high speed条件における4筋の平均標準化RMSはlow speed条件に比して有意に高値を示した。

Shear Wave Elastographyを用いた大腿四頭筋スティフネスの定量評価

河合誠, 谷口圭吾, 金谷耕平, 片寄正樹

日本整形外科超音波学会会誌 ( 日本整形外科超音波学会 ) 26 ( 1 ) 48 - 55 2015年03月

筋収縮不全を認めた膝関節術後患者7名(男2、女5、平均20.4歳)および健常成人7名(男5、女2、平均24.0歳)を対象に、超音波剪断波エラストグラフィを用いて大腿四頭筋スティフネスを測定した。膝関節術後患者における安静時の筋の弾性率は患側と健側で差は認められなかったが、大腿四頭筋セッティング(膝窩にタオルを置き、臀部および踵部が浮き上がらないようにタオルをつぶしながら大腿四頭筋の等尺性収縮を行う)時は患側の弾性率が健側より有意に小さかった。一方、筋厚や羽状角に健患差は認められず、弾性率の変化は筋形状とは関連の低い独立した指標である可能性が示唆された。超音波剪断波エラストグラフィは運動制約の強い術後早期においても、簡便かつ直接的に筋機能を捉えられる定量的な評価手段となり得ると考えた。

Acute decrease in the stiffness of resting muscle belly due to static stretching

Taniguchi K, Shinohara M, Nozaki S, Katayose M

Scandinavian journal of medicine & science in sports 25 ( 1 ) 32 - 40 2015年02月 [査読有り]

膝関節術後症例における収縮時の大腿四頭筋スティフネスの定量評価

河合誠, 谷口圭吾, 末永生夏, 鈴木智之, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 63 ( 6 ) 717 - 717 2014年12月

等速性股関節屈曲・伸展運動における股関節内転筋群の筋活動と股関節角度の関係

加藤拓也, 谷口圭吾, 池田祐真, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 63 ( 6 ) 574 - 574 2014年12月

筋組織の剪断弾性に及ぼすストレッチングの急性効果

谷口圭吾, 野崎修平, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 63 ( 6 ) 575 - 575 2014年12月

利き手と非利き手における水平面の肩甲上腕リズムの相違について

野村勇輝, 戸田創, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 22 ( 4 ) S163 - S163 2014年10月

Three-dimensional analysis of the tibiotalar joint of intact male feet under unloaded and axial-loaded conditions

Nozaki S, Taniguchi K, Watanabe K, Katayose M

Journal of Musculoskeletal Research 17 ( 3 ) 1450012-1 - 9 2014年09月 [査読有り]

剪断波エラストグラフィを用いたストレッチング時の下腿筋スティフネスの定量

谷口圭吾, 金谷耕平, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 26回 56 - 56 2014年07月

外転、屈曲および肩甲骨面挙上運動における肩甲骨後傾角度とその変化量の比較

野村勇輝, 戸田創, 市川智士, 片寄正樹

JOSKAS ( (一社)日本関節鏡・膝・スポーツ整形外科学会 ) 39 ( 4 ) 151 - 151 2014年07月

Effect Of Rearfoot Position On The Stiffness Of The Gastrocnemius Muscle During Standing Wall Stretching

Nozaki Shuhei, Tanguchi Keigo, Katayose Masaki

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 46 ( 5 ) 192 2014年05月 [査読有り]

DOI

Validity of fascicle length estimation in the vastus lateralis and vastus intermedius using ultrasonography

Ryosuke Ando, Keigo Taniguchi, Akira Saito, Mineko Fujimiya, Masaki Katayose, Hiroshi Akima

JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY ( ELSEVIER SCI LTD ) 24 ( 2 ) 214 - 220 2014年04月 [査読有り]

The purpose of this study was to determine the validity of fascicle length estimation in the vastus lateralis (VL) and vastus intermedius (VI) using ultrasonography. The fascicle lengths of the VL and VI muscles were measured directly (dFL) using calipers, and were estimated (estmFL) using ultrasonography, in 10 legs from five Thiel's embalmed cadavers. To determine the validity of the estmFLs, FL was estimated using five previously published models and compared with dFL. The intraclass correlation coefficients (ICCs) of two of the five models were >0.75, indicating that these estimates were valid. Both of these models combined measurement of the length of the visible part of the fascicle with linear extrapolation of the length of the part of the fascicle that was not visible on the sonographic image. The ICCs and absolute% difference were best in models that used appropriate pennation angles. These results suggest that two of the five previously published models are valid for obtaining estmFL of the VL and VI using ultrasonography. (C) 2014 Elsevier Ltd. All rights reserved.

DOI PubMed

静的ストレッチングが安静時の筋スティフネスに及ぼす影響

谷口圭吾, 片寄正樹

日本整形外科超音波学会会誌 ( 日本整形外科超音波学会 ) 25 ( 1 ) 63 - 69 2014年03月

若年健常成人10名(男性5名、女性5名、平均21.8歳)を対象に、超音波剪断波エラストグラフィを用いて筋スティフネスに及ぼす静的ストレッチング効果について検討した。ストレッチング介入前に計測した剪断弾性係数の良好な再現性(腓腹筋内側頭:ICC=0.98・CV:1.2、腓腹筋外側頭:ICC=0.97・CV:2.0)を確認した。腓腹筋の剪断弾性係数は筋頭と時間に有意な主効果を認め、外側頭に比べ内側頭で高値を示した。ストレッチング介入直後に両筋頭とも剪断弾性係数は減少し、時間経過に伴って減少率が小さくなったが、15分後までは有意な低値を示し、20分後で初期値に戻った。羽状角はストレッチング介入前と直後で内側頭、外側頭とも有意差は認めなかったが、背屈角度は介入直後で有意に増大し、20分後に初期値に戻った。

等速性膝関節伸展運動時の中間広筋の筋活動-関節角度関係

河合誠, 谷口圭吾, 秋間広, 山下敏彦, 片寄正樹

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 88 ( 3 ) S782 - S782 2014年03月

Effects of different movement directions on electromyography recorded from the shoulder muscles while passing the target positions

Yoshinari Sakaki, Fuminari Kaneko, Kota Watanabe, Takuma Kobayashi, Masaki Katayose, Nobuhiro Aoki, Eriko Shibata, Toshihiko Yamashita

Journal of Electromyography and Kinesiology 23 ( 6 ) 1362 - 1369 2013年12月 [査読有り]

Purpose: We compared electromyography (EMG) recorded from the shoulder joint muscles in the same position for different movement directions. Methods: Fifteen healthy subjects participated. They performed shoulder elevation from 0° to 120°, shoulder depression from 120° to 0°, shoulder horizontal adduction from -15° to 105°, and shoulder horizontal abduction from 105° to -15°. The target positions were 90° shoulder elevation in the 0°, 30°, 60°, and 90° planes (0°, 30°, 60°, and 90° positions). EMG signals were recorded from the supraspinatus (SSP) muscle by fine-wire electrodes. EMG signals from the infraspinatus (ISP), anterior deltoid, middle deltoid, and posterior deltoid muscles were recorded using active surface electrodes. Results: During elevation and horizontal abduction, the SSP showed significantly higher activity than that shown during depression and during horizontal adduction in the 0°, 30°, and 60° positions. During elevation, the ISP showed significantly higher activity than during depression and during horizontal adduction in the 90° position. During horizontal abduction, the ISP showed significantly higher activity than during depression in the 90° position. Conclusions: When the movement tasks were performed in different movement directions at the same speed, each muscle showed characteristic activity. © 2013 Elsevier Ltd.

DOI PubMed

等速性膝関節伸展運動における関節角速度変化に伴う大腿四頭筋の活動特性

河合誠, 谷口圭吾, 齋藤輝, 秋間広, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 62 ( 6 ) 633 - 633 2013年12月

Osgood-Schlatter病の遺残骨片を外側アプローチを用いて摘出した2例

興村慎一郎, 渡邉耕太, 小林拓馬, 片寄正樹, 谷口圭吾, 山下敏彦

整形・災害外科 ( 金原出版(株) ) 56 ( 12 ) 1517 - 1520 2013年11月

症例1(中学1年生、女)。3〜4年前からスポーツ活動時に両膝前方疼痛を自覚、Osgood-Schlatter病と診断され、保存治療を受けるも疼痛が増強したため受診となった。所見では両側脛骨粗面の突出、脛骨粗面から膝蓋腱上に圧痛が認められ、膝関節可動域制限はないものの、スクワット動作は困難であった。一方、X線では両脛骨粗面近位に複数の遊離骨片ほか、左膝には脛骨粗面の近位に骨隆起がみられ、MRIでは両膝とも膝蓋腱脛骨付着部の肥厚や不整、信号変化、また複数の骨片と深膝蓋下滑液包内の水腫が認められた。以上より、治療として膝蓋腱外側より進入して膝蓋腱付着部近位腹側を展開し、複数の遊離骨片の摘出を行い、次いで滑液包、脛骨粗面近位の骨突出部を切除した。その結果、術後のX線検査では骨片や骨突出は消失し、4ヵ月経過で患者はスポーツに完全復帰することができた。尚、術後1年目に膝立ち動作を行なったところ、痛みは認められなかった。症例2(高校2年生、男)。3年前からスポーツ活動時に左膝前方に疼痛を自覚、Osgood-Schlatter病と診断され、保存治療を受けていたが改善しなかったため受診となった。所見では左脛骨粗面に突出がみられ、症例1と同様の症状、画像所見であったことから同様の手術が施行された。その結果、術後3ヵ月で患者はスポーツに復帰することができ、術後6ヵ月目の膝立ち動作では痛みは認められなかった。

CiNii

肩関節外転時と肩甲骨面挙上時における肩甲骨の3次元運動の比較

野村勇輝, 戸田創, 市川智士, 片寄正樹

日本基礎理学療法学雑誌 ( (一社)日本基礎理学療法学会 ) 17 ( 1 ) 49 - 49 2013年10月

肩甲骨運動を考慮した投球動作における肩関節外旋運動の検討

井村麻椰, 戸田創, 野村勇輝, 市川智士, 片寄正樹

日本基礎理学療法学雑誌 ( (一社)日本基礎理学療法学会 ) 17 ( 1 ) 31 - 31 2013年10月

スキージャンプ選手に対する整形外科的メディカルチェック

渡邉耕太, 大坪英則, 寺本篤史, 鈴木智之, 小林拓馬, 工藤未来, 山下敏彦, 片寄正樹, 吉田真, 奥脇透

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 33 ( 4 ) 437 - 437 2013年08月

超音波を用いたCraig Testと3次元MRI大腿骨モデルによる大腿骨前捻角の比較

冨田悠平, 池田祐真, 本村遼介, 菅野洋平, 永井克明, 鈴木智之, 谷口圭吾, 渡邉耕太, 山下敏彦, 片寄正樹

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 33 ( 4 ) 450 - 450 2013年08月

投球動作解析における肩甲骨の動きを考慮した肩甲骨上腕関節水平外転角度の計測

戸田創, 野村勇輝, 市川智士, 渡邉耕太, 山下敏彦, 片寄正樹

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 33 ( 4 ) 374 - 374 2013年08月

静的ストレッチングが安静時の筋スティフネスに及ぼす影響

谷口圭吾, 片寄正樹

日本整形外科超音波学会学術集会プログラム・抄録集 ( 日本整形外科超音波学会 ) 25回 103 - 103 2013年07月

ストレッチングが腓腹筋の剪断弾性率に及ぼす影響

谷口圭吾, 野崎修平, 片寄正樹

JOSKAS ( (一社)日本関節鏡・膝・スポーツ整形外科学会 ) 38 ( 4 ) 501 - 501 2013年06月

大腿骨前捻角の違いが等尺性股関節外転運動における股関節外転筋活動に与える影響

本村遼介, 戸田創, 池田祐真, 冨田悠平, 管野洋平, 永井克明, 野崎修平, 角谷尚哉, 谷口圭吾, 渡邉耕太, 片寄正樹

JOSKAS ( (一社)日本関節鏡・膝・スポーツ整形外科学会 ) 38 ( 4 ) 420 - 420 2013年06月

Stiffness Quantification of Human Calf Muscle During Standing Wall Stretching Using Ultrasound Shear-wave Elastography

Taniguchi Keigo, Shinohara Minoru, Nozaki Shuhei, Katayose Masaki

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE ( LIPPINCOTT WILLIAMS & WILKINS ) 45 ( 5 ) 361 - 361 2013年05月 [査読有り]

Differences in Tibiotalar Joint Alignment During Non-loaded and Axial Loaded Condition in Intact Male Feet

Nozaki Shuhei, Taniguchi Keigo, Takashima Hiroyuki, Watanabe Kota, Hatakenaka Masamitsu, Katayose Masaki

MEDICINE AND SCIENCE IN SPORTS AND EXERCISE ( LIPPINCOTT WILLIAMS & WILKINS ) 45 ( 5 ) 55 - 56 2013年05月 [査読有り]

Analysis of effectiveness of therapeutic exercise for knee osteoarthritis and possible factors affecting outcome

Miki Kudo, Kota Watanabe, Hidenori Otsubo, Tomoaki Kamiya, Fuminari Kaneko, Masaki Katayose, Toshihiko Yamashita

Journal of Orthopaedic Science ( Springer Tokyo ) 18 ( 6 ) 932 - 939 2013年 [査読有り]

Background: There are numerous reports and evidences to suggest that exercise therapy is effective for knee osteoarthritis (knee OA). However, there is a lack of sufficient research concerning the factors influencing its application and effectiveness. The purposes of this study were to evaluate effects of the mode of treatment delivery on the improvement of symptoms in knee OA, and to analyze potential risk factors affecting improvement after exercise therapies. Methods: The 209 women applicants diagnosed with knee OA were randomly allocated into either a group performing group exercise in a class or a group performing home exercise. The 90 min exercise program was performed under the guidance of physiotherapists as a group exercise therapy. The Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) of the subjects of both groups before and after intervention was compared to examine the effect of exercise therapy. In addition, body mass index, knee range of motion (ROM), the femorotibial angle from radiographs, OA severity from Kellgren-Lawrence grade, and meniscus abnormality and subchondral bone marrow lesions from MRI findings were statistically analyzed as factors that may affect exercise therapy. Results: A significantly greater improvement in WOMAC was observed in the subjects of group exercise (81 subjects) as compared with the subjects of home exercise (122 subjects). There was a significantly high proportion of subjects with knee flexion contracture among the subjects participating in group exercise that showed only minor symptom improvement (p < 0.05). In addition, exercise therapy proved to be highly effective for subjects with limited quadriceps muscle strength (p < 0.05). Conclusions: When prescribing exercise therapy for knee OA, evaluation of a subject's ROM and muscle strength is important in deciding whether to commence exercise therapy and what type of exercise therapy to apply it is also important in predicting the effect of exercise therapy. © 2013 The Japanese Orthopaedic Association.

DOI PubMed

Kinesthetic perception based on integration of motor imagery and afferent inputs from antagonistic muscles with tendon vibration

Shibata, E, Kaneko, F, Katayose, M

Neuroscience Letters 541 24 - 28 2013年 [査読有り]

DOI

ストレッチングが筋束部の組織弾性に及ぼす影響超高速超音波法を用いた検討

谷口圭吾, 野崎修平, 河合誠, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 61 ( 6 ) 747 - 747 2012年12月

成長期のスポーツ障害成長期スポーツ障害中学・高校スピードスケート選手

渡邉耕太, 寺本篤史, 大坪英則, 山下敏彦, 三本欽也, 片寄正樹, 戸田創, 池田祐真, 鈴木智之, 森茂樹, 吉川祐樹

東日本整形災害外科学会雑誌 ( 東日本整形災害外科学会 ) 24 ( 3 ) 266 - 266 2012年08月

高校スピードスケート選手に対するメディカルチェックと腰椎MRI所見

渡邉耕太, 鈴木智之, 寺本篤史, 大坪英則, 三本欽也, 片寄正樹, 戸田創, 池田祐真, 森茂樹, 吉川祐樹, 山下敏彦

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 32 ( 4 ) 371 - 371 2012年08月

運動療法に伴う筋スティフネス変化の定量評価超高速超音波法を用いた検討

谷口圭吾, 野崎修平, 池田祐真, 本村遼介, 河合誠, 片寄正樹

超音波医学 ( (公社)日本超音波医学会 ) 39 ( Suppl. ) S586 - S586 2012年04月

大腿筋膜張筋スティフネスに及ぼす股関節の他動的運動の影響超高速超音波法による検討

河合誠, 谷口圭吾, 野崎修平, 池田祐真, 本村遼介, 片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 39 ( Suppl.2 ) 1056 - 1056 2012年04月

超音波せん断波の超高速イメージングによる腓腹筋の定量的な組織弾性評価

谷口圭吾, 片寄正樹

日本整形外科超音波研究会会誌 ( 日本整形外科超音波学会 ) 23 ( 1 ) 48 - 53 2012年03月

健常若年ボランティア13名を被験者として超音波せん断波エラストグラフィによる腓腹筋の弾性計測を試み、検者内再現性について検討するとともに、計測肢位・足関節角度の違いが計測値に及ぼす影響について検討した。結果、検者内再現性は良好であった。計測肢位・足関節角度の違いによって計測値は著明に増減し、この増減は、筋活動や筋の他動的伸張度を反映する可能性が示唆された。

Microscopic analysis of the iliofemoral and ischiofemoral ligaments in the hip joint: collagen fiber direction and crimp distribution

Kaori Sato, Eiichi Uchiyama, Masaki Katayose, Mineko Fujimiya

ANATOMICAL SCIENCE INTERNATIONAL ( SPRINGER ) 87 ( 1 ) 50 - 55 2012年03月 [査読有り]

Since no previous studies have described the functional significance of the iliofemoral and ischiofemoral ligaments on the basis of microscopic analyses, we examined the direction of collagen fiber alignment and crimp distribution of the collagen fibers in sections cut in different directions. Polarized microscopic images of sections along the longitudinal (L) and transverse (T) planes of each ligament were obtained from 20 cadavers (8 males and 12 females, age at death 81.7 +/- A 9.4 years old). Results showed that the microscopic direction of collagen fibers in the iliofemoral ligament was parallel to the macroscopic direction, suggesting that this ligament may play a part in restricting extension of the hip joint. In contrast, the microscopic direction of collagen fibers in the ischiofemoral ligament was not parallel to the macroscopic direction, suggesting that this ligament may contribute not only to the restriction of medial rotation but also retstriction of flexion of the hip joint. From the low density of the crimp distribution in the L plane, the iliofemoral ligament may contribute to stability of the hip joint in the standing position in the living body. In conclusion, the microscopic observations of the direction of collagen fibers as well as the crimp distribution shown in the present study provide a better understanding of the functional significance of the iliofemoral and ischiofemoral ligaments.

DOI PubMed

後足部回内外肢位が静的ストレッチ中のヒラメ筋内弾性に与える影響

野崎修平, 谷口圭吾, 池田祐真, 河合誠, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 86 ( 3 ) S530 - S530 2012年03月

長内転筋の局所弾性に及ぼす股関節内外旋運動の影響超音波剪断波の超高速イメージングによる検討

池田祐真, 谷口圭吾, 野崎修平, 河合誠, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 86 ( 3 ) S532 - S532 2012年03月

ストレッチング時の下腿三頭筋組織における弾性分布の可視化・定量評価超音波せん断波の超高速イメージングによる検討

谷口圭吾, 野崎修平, 池田祐真, 片寄正樹, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 86 ( 2 ) S73 - S73 2012年02月

Acute effect of static stretching on the stiffness of human gastrocnemius muscle associated with ultrasound shear-wave elastography

Taniguchi, K, Shinohara M, Nozaki S, Katayose M

XIX Biennial Conference of the International Society of Electrophysiology and Kinesiology 2012年 [査読有り]

下腿筋の局所弾性に及ぼす足関節背屈の影響超音波せん断波の超高速イメージングによる検討

谷口圭吾, 野崎修平, 池田祐真, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 60 ( 6 ) 883 - 883 2011年12月

体幹障害のリハビリテーション (スポーツ障害のリハビリテーション--運動連鎖からのアプローチ)

菅原一博, 片寄正樹

Monthly book medical rehabilitation ( 全日本病院出版会 ) ( 137 ) 48 - 53 2011年10月

CiNii

非予測条件がサイドステップカッティング動作時における膝周囲筋筋活動に与える影響

森田寛子, 谷口圭吾, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 19 ( 4 ) S182 - S182 2011年10月

静的ストレッチングが腓腹筋の局所弾性に及ぼす急性効果

谷口圭吾, 野崎修平, 池田祐真, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 19 ( 4 ) S159 - S159 2011年10月

ANALYSIS OF MUSCLE ACTIVITY AND ANKLE JOINT MOVEMENT DURING THE SIDE-HOP TEST

Masahiro Yoshida, Keigo Taniguchi, Masaki Katayose

JOURNAL OF STRENGTH AND CONDITIONING RESEARCH ( LIPPINCOTT WILLIAMS & WILKINS ) 25 ( 8 ) 2255 - 2264 2011年08月 [査読有り]

Yoshida, M, Taniguchi, K, and Katayose, M. Analysis of muscle activity and ankle joint movement during the side-hop test. J Strength Cond Res 25(8): 2255-2264, 2011-Functional performance tests (FPTs) that consist of movements, such as hopping, landing, and cutting, provide useful measurements. Although some tests have been established for kinematic studies of the knee joint, very few tests have been established for the ankle joint. To use the FPT as a test battery for patients with an ankle sprain, it is necessary to document typical patterns of muscle activation and range of motion (ROM) of the ankle joint during FPTs. Therefore, the purpose of this study was to investigate the pattern of the ROM of the ankle inversion/eversion and the muscle activity of the peroneus longus muscle (PL) and the tibial anterior muscle (TA) in normal subjects during the side-hop test. To emphasize the characteristics of ROM and electromyography (EMG) at each phase, the side-hop tests were divided into 4 phases: lateral-hop contact phase (LC), lateral-hop flight phase (LF), medial hop contact phase (MC), and medial hop flight phase (MF), and the ROM of ankle inversion/eversion, a peak angle of ankle inversion, and Integral EMG (IEMG) of PL and TA compared among 4 phases. Fifteen male subjects with no symptoms of ankle joint problems participated in this research. The ROM of ankle inversion/eversion during the side-hop test was 27 +/- 3.8 degrees (mean +/- SD), and there was a significant difference in the ROM of ankle inversion/eversion among 4 phases (p < 0.05). The phase in which the widest ROM was presented was the MF. A peak angle of the ankle inversion at MC was significantly greater than at LC and MF (p < 0.05). A peak angle of the ankle inversion at LF was significantly greater than at LC and MF. The PL remained contracting with 50-160% of maximal voluntary contraction (MVC). The IEMGs of PL in both the contact phases were significantly greater than in both the flight phases (p < 0.05). In addition, the PL activity at LC was significantly greater than at MC. The TA remained contracting at 50-80% of MVC through the side-hop test. The IEMG of TA at both the contact phases was significantly greater than at 2 flight phases. However, there was no significant difference between LC and MF. Results of this study could be useful as basic data when evaluating the validity of the side-hop test for patients with ankle sprain.

DOI PubMed

超音波せん断波の超高速イメージングによる骨格筋の定量的な組織弾性評価

谷口圭吾, 片寄正樹

日本整形外科超音波研究会演題抄録集 ( 日本整形外科超音波学会 ) 23回 56 - 56 2011年07月

サイドステップカッティング動作中の股関節運動と股関節周囲筋の筋活動長内転筋に注目して

池田祐真, 戸田創, 谷口圭吾, 片寄正樹

日本運動療法学会大会抄録集 ( 日本運動療法学会 ) 36回 32 - 32 2011年06月

香港理工大学との国際交流について

山口雅子, 坪田貞子, 片寄正樹, 乾公美

札幌医科大学保健医療学部紀要 = Bulletin of School of Health Sciences Sapporo Medical University ( 札幌医科大学保健医療学部 ) ( 13 ) 117 - 121 2011年03月

香港理工大学 Faculty of Health and Social Sciences（医療及社会科学院）と札幌医科大学は、国際交流覚書の締結を予定している。香港理工大学医療及社会科学院との覚書締結により、研究者の派遣事業が始まる予定である。本論文は、香港理工大学及び医療及社会科学院Department of Rehabilitation（康復治療科学系）の紹介、覚書締結までの推移、平成22年1月11日香港理工大学視察の概要について述べたものである。香港理工大学において、教員（研究者）派遣事業、学生間交流事業、テレビ回線を利用した2大学間のTV-Conference、アジア太平洋地域のリハビリテーション医学・医療に携わる研究者の国際会議の開催等について検討した。香港理工大学と国内他大学との学生交換留学制度の紹介とメディカルツーリズム参入について将来構想として私見を述べた。

DOI CiNii

スキー外傷予防プログラムの実施が運動機能に及ぼす効果の検討

谷口圭吾, 森田寛子, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 59 ( 6 ) 931 - 931 2010年12月

足関節底屈運動による疲労がジャンプ着地前の長腓骨筋の筋活動開始時間、筋活動量に与える影響

野崎修平, 谷口圭吾, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 18 ( 4 ) S172 - S172 2010年10月

スキークロスナショナルチームにおける傷害発生状況

服部徹, 伴さやか, 寒川美奈, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 18 ( 4 ) S170 - S170 2010年10月

大学バドミントン部におけるスポーツ外傷・障害調査

吉田昌弘, 吉田真, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 59 ( 3 ) 335 - 335 2010年06月

Reliability of Measuring Humeral Retroversion Using Ultrasound Imaging in a Healthy Nonthrowing Population

Makoto Yoshida, Yasuaki Saho, Masaki Katayose

JOURNAL OF SPORT REHABILITATION ( HUMAN KINETICS PUBL INC ) 19 ( 2 ) 149 - 160 2010年05月 [査読有り]

Context: Studies have reported the difference in humeral retroversion (HR) between the dominant and nondominant side in throwing athletes. However, there are few data concerning HR for the rest of the population. In addition, the relationship between HR and external (ER) and internal rotation (ER) at 900 shoulder abduction has not been thoroughly investigated. Objectives: To investigate the reliability of ultrasound methodology to measure HR. In addition, using ultrasonography, the authors compare HR between the dominant and nondominant sides in healthy adult men and determine the relationship between HR and ER and IR at 90 degrees of shoulder abduction. Design: Descriptive study. Setting: Laboratory. Participants: Thirty-seven healthy male subjects (age 21.9 +/- 2.4 y, height 172.9 +/- 5.3 cm, weight 66.0 +/- 7.2 kg) with no history of shoulder or elbow injury, recruited from a convenience sample, volunteered for the study. Main Outcome Measures: Subjects were bilaterally examined for HR, ER, and IR. HR was measured by ultrasonography. Results: The intrarater reliability of the ultrasound methodology was .91.98, and the interrater reliability was .97. The HR angle on the dominant side (mean +/- SD: 68.5 degrees +/- 10.0 degrees) was significantly greater than that of the nondominant side (58.0 degrees - 8.4 degrees; P<.001). ER on the dominant side was significantly greater than on the nondominant side (P<.001), whereas IR on the dominant side was significantly smaller than on the nondominant side (P<.001). Total arc of motion for the dominant side was not significantly different from that of the nondominant side (P=.335). Conclusion: In the current study, ultrasound methodology to measure HR showed high interrater reliability, as well as high intrarater reliability. In addition, this study indicates that healthy Japanese adult men have side-to-side differences in HR.

PubMed

A comparison of the strength of the abduction of the little and index fingers and palmar abduction and opposition of the thumb between college baseball players and inexperienced sports players

Chikenji T, Toda H, Gyoku C, Oikawa N, Katayose M, Tsubota S

Journal of Musculoskeletal Research 13 ( 2 ) 75 - 82 2010年 [査読有り]

The purpose of this study was to investigate the strengths of four intrinsic muscles of the hand of college baseball players. The strengths of four intrinsic muscle groups were measured by the Rotterdam Intrinsic Hand Myometer (RIHM) which has been developed to assess the abduction of the little finger and index finger, and palmar abduction and opposition of the thumb. The strengths of these four intrinsic muscle groups were compared between baseball players and inexperienced sports players. The abduction of the little finger and index finger, and the opposition of the thumb in both the dominant and nondominant hands of the baseball players were notably stronger than those of the inexperienced sports players. There was no statistical difference in the strength of the palmar abduction of the thumb between the two groups. The results suggest that the specific intrinsic muscles in both the dominant and nondominant hands might be strengthened by repeated baseball practices, such as a batting performance, which requires strain in both the dominant and nondominant hands repeatedly. © 2010 World Scientific Publishing Company.

DOI

Analysis of tibial rotation using magnetic resonance imaging

Mina Samukawa, Toru Yamamoto, Shigenori Miyamoto, Aogu Yamaguchi, Masaki Katayose

MANUAL THERAPY ( CHURCHILL LIVINGSTONE ) 14 ( 6 ) 712 - 715 2009年12月 [査読有り]

DOI PubMed

超音波補正音速計測による骨格筋の組織性状評価の検討

谷口圭吾, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 58 ( 6 ) 602 - 602 2009年12月

インサイドキックとインステップキックにおける蹴り脚長内転筋の活動の相違

池田祐真, 谷口圭吾, 吉田昌弘, 菅原一博, 戸田創, 片寄正樹

体力科学 ( (一社)日本体力医学会 ) 58 ( 6 ) 757 - 757 2009年12月

硬式テニス選手における前腕伸筋群の筋断面積と手関節背屈筋力の関係

榊善成, 谷口圭吾, 吉田昌弘, 菅原一博, 舟根聡太, 片寄正樹, 金子文成

体力科学 ( (一社)日本体力医学会 ) 58 ( 6 ) 758 - 758 2009年12月

大腿四頭筋の筋疲労が片脚Drop-Jump Testに与える影響二次元動作分析を用いて

中田周兵, 今小百合, 寒川美奈, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 17 ( 4 ) S107 - S107 2009年10月

フリースタイルモーグルナショナルチームブロック強化選手における傷害発生状況と柔軟性の評価

寒川美奈, 吉田真, 松本尚, 服部徹, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 17 ( 4 ) S110 - S110 2009年10月

スキー選手に対する膝前十字靱帯再建術後のリハビリテーション

寒川美奈, 片寄正樹

臨床スポーツ医学 = The journal of clinical sports medicine ( 文光堂 ) 26 ( 7 ) 821 - 827 2009年07月

CiNii

下腿三頭筋の組織性状評価に向けた超音波補正音速値計測の信頼性

谷口圭吾, 片寄正樹, 島村勲

日本整形外科超音波研究会演題抄録集 ( 日本整形外科超音波学会 ) 21回 26 - 26 2009年07月

変形性膝関節症のX線病期分類と超音波像による軟骨評価の関係

金子文成, 佐保泰明, 青山敏之, 谷口圭吾, 片寄正樹, 渡邊耕太, 山下敏彦

日本整形外科学会雑誌 ( (公社)日本整形外科学会 ) 83 ( 3 ) S438 - S438 2009年03月

足関節捻挫群におけるSide Hop TestおよびSide Jump Testと足関節周囲筋々力の関係

舟根聡太, 吉田昌弘, 森田寛子, 吉田真, 谷口圭吾, 片寄正樹

理学療法学 ( (公社)日本理学療法士協会 ) 36 ( Suppl.2 ) 532 - 532 2009年03月

The intra-rater and inter-rater reliability of the revised ultrasound velocity measurements in human triceps surae muscles in vivo

Taniguchi K, Katayose M

Journal of the Japanese Society of Orthopedic Ultrasonics ( 日本整形外科超音波学会 ) 21 ( 1 ) 19 - 23 2009年 [査読有り]

健常男性14名を対象とし、超音波装置を用いて、2名の検者が各々5回計測し、筋横断面像から方位方向の解像度が最大となる音速補正値を求め、計測データより検者内・検者間信頼性として級内相関係数(ICC)を統計解析した。その結果、検者内のICCは0.78〜0.88を示し、検者間のICCでは0.56〜0.79となった。係数0.9以上を満たす条件を探索すると測定回数3回以上であった。以上、下腿三頭筋の音速補正値測定における信頼性は比較的高いことが確認され、3回反復測定した平均値を用いれば十分な信頼性を保証できると考えられた。

超音波画像診断装置による前距腓靱帯の定量評価の検討

菅原一博, 吉田昌弘, 戸田創, 吉田真, 谷口圭吾, 片寄正樹

理学療法学Supplement ( 公益社団法人日本理学療法士協会 ) 2008 ( 0 ) C3P1490 - C3P1490 2009年

【目的】足関節捻挫の理学評価では、複数の徒手による特殊検査が用いられる．前距腓靱帯(ATFL) 損傷の重傷度は、前方引き出しテスト（Anterior Drawer Test: ADT）を用いて段階的（I～III度）に評価されるのが一般的である．ADTはATFLの有用な特殊検査であるが、定量的な評価をすることはできない．個々の重傷度に合わせた治療プログラムを処方するためには、ATFLの定量的評価が必要である．既に、X線を用いたATFL損傷の定量化は実用化されているが、評価できる環境が制限されるため簡便性は低い．したがって、安全で簡便性の高い新たなATFL評価方法の考案が求められている．本研究の目的は、新たなATFL損傷の定量的評価方法として、超音波画像を用いADTにおける前距腓靱帯の伸張距離を計測し、検者内および検者間の再現性を調べることである． 【方法】対象はバドミントン部に所属する大学生のうち、過去1年以内に足関節捻挫の既往がある8名10足（男子3名、女子5名）であった．前距腓靱帯の撮影には超音波画像診断装置（MEDISON社製、PICO）を使用した．撮影肢位はベッド上仰臥位で、足関節底屈位20度とした．安静時およびADT時における足関節捻挫既往側のATFLを撮影し、ATFL、距骨、外果を撮像した画像から解析ソフトを用いてATFLの伸張距離を0.1mm単位で計測した．本研究では、外果と距骨をランドマークとし、骨間距離をATFLの伸張距離として計測した．ATFL伸張距離の計測に関する検者内および検者間の再現性について級内相関係数（ICC）を用いて調べた．尚、本研究は札幌医科大学倫理委員会の承認に基づき実施した． 【結果】超音波画像上では、ATFL、距骨、外果を明確に捉えることができた．安静時のATFL 伸張距離は16.6±3.9mmであり、ADT時では19.7±4.9mmであった．ADT時では、安静時と比較してATFLの伸張距離に有意な増大が認められた（p<0.01）．また、安静時、ADT時ともに、同一検者内および検者間において高い再現性が得られた． 【考察】本研究では、ATFL損傷の定量的評価方法として超音波画像によるATFL伸張距離の計測を試みたが、安静時とADT時では明らかなATFLの伸張を画像から確認することができた．また、検者内、検者間ともに高い再現性を得られたため、ATFL損傷評価の定量化には超音波画像を用いた評価方法が有用であることが示唆された．

CiNii

メディカルフィットネスクラブ登録者におけるメディカルチェック項目に含まれる因子に関する研究所有整形外科疾患による特徴の理解

戸田創, 大岩正太郎, 高尾良英, 福田潤, 齋藤啓二, 川口行雄, 吉田昌弘, 片野唆敏, 菅原一博, 舟根聡太, 森田寛子, 谷口圭吾, 古名丈人, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 16 ( 4 ) S133 - S133 2008年10月

内科疾患を有するメディカルフィットネスクラブ登録者の体重減少率に影響を与える要因の検討

森田寛子, 大岩正太郎, 高尾良英, 福田潤, 齋藤啓二, 川口行雄, 吉田昌弘, 片野唆敏, 菅原一博, 戸田創, 舟根聡太, 谷口圭吾, 古名丈人, 片寄正樹

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 16 ( 4 ) S174 - S174 2008年10月

フリースタイルスキーモーグルナショナルチームにおける2004-2008シーズン中の傷害発生状況

寒川美奈, 吉田真, 松本尚, 木田貴英, 谷口圭吾, 片寄正樹, 大西祥平

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 16 ( 4 ) S195 - S195 2008年10月

成長期スポーツ腰痛に対するリハビリテーション (成長期のスポーツ障害とリハビリテーション)

菅原一博, 片寄正樹

Monthly book medical rehabilitation ( 全日本病院出版会 ) ( 96 ) 38 - 42 2008年09月

CiNii

腰椎捻挫(ぎっくり腰)--発症メカニズムとその予防・再発予防 (予防としてのスポーツ医学--スポーツ外傷・障害とその予防・再発予防) -- (スポーツ外傷とその予防・再発予防)

片寄正樹

臨床スポーツ医学 ( 文光堂 ) 25 ( 0 ) 70 - 74 2008年

CiNii

メディカルフィットネス登録会員の運動習慣に影響を与える因子の検討

大岩正太郎, 高尾良英, 斉藤啓二, 福田潤, 片寄正樹, 谷口圭吾, 吉田昌弘, 佐保泰明, 菅原一博

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 15 ( 4 ) S172 - S172 2007年10月

中高年におけるメディカルフィットネス会員の運動制限因子の検討

吉田昌弘, 高尾良英, 斉藤啓二, 福田潤, 片寄正樹, 谷口圭吾, 大岩正太郎, 佐保泰明, 菅原一博

日本臨床スポーツ医学会誌 ( (一社)日本臨床スポーツ医学会 ) 15 ( 4 ) S172 - S172 2007年10月

膝関節に痛みを有する中高年女性への運動介入研究運動機能、痛み、セルフエフィカシーの関連から

古名丈人, 伊藤弥生, 金子文成, 片寄正樹, 小島悟, 谷口圭吾

日本老年医学会雑誌 ( (一社)日本老年医学会 ) 44 ( Suppl. ) 103 - 103 2007年05月

他動的足関節背屈運動に伴う腓腹筋の筋形状変化

谷口圭吾, 片寄正樹, 佐保泰明, 吉田真, 吉田昌弘, 大岩正太郎, 渡邉耕太, 山下敏彦

日本整形外科スポーツ医学会雑誌 ( (一社)日本整形外科スポーツ医学会 ) 27 ( 1 ) 55 - 55 2007年05月

腓腹筋の筋厚、羽状角、筋束長に及ぼす他動的足関節背屈の影響

谷口圭吾, 佐保泰明, 片寄正樹, 古名丈人, 小島悟

理学療法の医学的基礎 ( (一社)日本基礎理学療法学会 ) 11 ( 1 ) 30 - 30 2007年05月

トレーナーサポートの組織化

片寄正樹

臨床スポーツ医学 = The journal of clinical sports medicine 24 ( 2 ) 185 - 189 2007年02月

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MRIを用いたコンディションの指標 : スピードスケート選手を対象とした身体組成の分析

渡邉耕太, 高尾良英, 向井直樹, 飛田格子, 油井直子, 村上成道, 片寄正樹, 山下敏彦, 奥脇透, 本間俊行, 柳澤修, 高橋英幸

臨床スポーツ医学 = The journal of clinical sports medicine 24 ( 2 ) 173 - 178 2007年02月

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The effect of tibial rotation on the presence of instability in the anterior cruciate ligament deficient knee

Mina Samukawa, David Magee, Masaki Katayose

JOURNAL OF SPORT REHABILITATION ( HUMAN KINETICS PUBL INC ) 16 ( 1 ) 2 - 17 2007年02月 [査読有り]

Context: The effects of tibial rotation after ACL injury have not yet been well determined. Objective: To show whether clinical outcomes such as the amount of tibial rotation can affect functional outcomes in normal and ACL deficient knees. Design: Case control study. Setting: Research laboratory. Participants: Twenty normal subjects (Control) and 20 subjects with ACL deficient knees (ACL). Main Outcome Measures: Tibial rotation at 30 and 90 degrees of knee flexion was measured using an inclinometer. One-legged hop, crossover hop, figure-of-eight running and 10-m running tests were used and determined the effect(s) of tibial rotation on the outcome of the functional tests. Results: There were significant between-group differences in internal and external rotation. The relationship between external tibial rotation and the figure-of-eight index was significantly negatively correlated. Conclusions: The amount of tibial rotation is greater in ACL ruptured knees than in uninjured knees, and these greater amounts of tibial rotation affected the figure-of-eight running index.

DOI PubMed

トレーナーサポートの組織化 (特集寒冷環境下競技におけるトップアスリートのコンディショニング--第20回オリンピック冬季競技大会における健康管理)

片寄正樹

臨床スポーツ医学 ( 文光堂 ) 24 ( 2 ) 185 - 189 2007年

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投球障害肩に対する積極的理学療法により完全復帰した社会人野球投手の1例

片寄正樹, 谷口圭吾, 岡村健司, 山下敏彦, 山崎肇

北海道整形災害外科学会雑誌 ( 北海道整形災害外科学会 ) 47 ( 2 ) 162 - 163 2006年03月

中高齢者の膝痛に対するヘルスケアとしての理学療法の応用に関する研究3:日常生活身体活動度と歩行機能からみた介入効果

中村祐美子, 金子文成, 小笠原一生, 古名丈人, 綿谷美佐子, 片寄正樹

理学療法学Supplement ( 公益社団法人日本理学療法士協会 ) 2005 ( 0 ) C0168 - C0168 2006年

【はじめに】
我々は，中高齢者の慢性的な膝痛改善を目的として理学療法を応用したヘルスケアサービスを実施するためのシステム構築を試み，その効果について検討することを目的に研究事業を実施した。膝関節の疼痛が日常生活身体活動度(Phys-Act)を制限することは容易に予想されるため，Phys-Actは我々が実施した介入効果のアウトカム評価項目の一つとして有効であろうと考えた。本研究は，歩行速度，及びPhys-Actを指標として介入プログラムの効果について検討することを目的とした。
【方法】
1）対象：札幌市及び近郊在住の55-75歳の女性で，膝関節に慢性的な疼痛又は不安感を訴えるものとした。参加応募者の中から除外基準[(1)日本整形外科学会膝疾患治療成績判定基準(JOA-S)が70点以下，(2)急性的に疼痛が憎悪し3週間以内に病院を受診した症例，(3)疼痛や拘縮のために横座り又は胡坐が不可能である，(4)膝痛以外に疾患を有する]適応外の者を一次抽出した。さらに本研究固有の調査票への回答値から層化割り付けして分類された介入群と対照群のうち，介入群17名を対象に測定を行なった。対象者は，事前に倫理委員会の承認を得た研究計画書に基づいて十分な説明を受けた後，同意書に署名した。
2）測定方法と分析：(1)歩行速度は通常歩行速度と最大歩行速度を計測した。いずれも11mの歩行路上で3-8mの区間に要する時間を計測した。(2)Phys-Actの計測には，腕時計型行動記録装置ViM(マイクロストーン社製)を用いた。この装置は加速度センサとジャイロセンサにより運動状態を10種類の活動度に分類して評価することができる。今回は歩数，運動種類と活動度の相対的割合(活動パタン)を指標とした。介入プログラム開始後および終了前2週間の各期間に，各自が4日以上装着し，一日の平均を算出して個人の代表値とした。ViMを装着している期間に明らかに日常と異なる活動をした日は分析から除外した。
3）介入プログラム：介入は1回当り約90分，週2回を12週間実施した。介入プログラムは，ストレッチング，固定自転車による有酸素運動，マシンや自重による筋力強化運動，不安定パッドやボールによるスタビライゼーションで構成した。
【結果】
通常歩行速度は変化しなかったが，最大歩行速度は介入後に有意に速くなった。Phys-Actについて，歩数には変化がなかった。しかし，活動パタンは有意に変化し，坐位作業と判断される活動割合が有意に減少し，立位作業や軽いスポーツと判断される割合が増加していた。
【考察とまとめ】
介入プログラム後には，高齢者の基礎的運動能力を代表するといわれる最大歩行速度が改善していた。さらに，活動パタンの変化から介入後にPhys-Actが高まったことが示唆された。これらの結果は本介入プログラムの効果を示すものと考えた。

DOI CiNii

The effect of glenohumeral rotation on scapular upward rotation in different positions of scapular-plane elevation

Jun Sagano, David Magee, Masaki Katayose

Journal of Sport Rehabilitation ( Human Kinetics Publishers Inc. ) 15 ( 2 ) 144 - 155 2006年 [査読有り]

Context: Glenohumeral and scapular upward rotation are important factors in functional upper extremity motion. Objectives: To determine how different amounts of glenohumeral rotation (internal, external, and neutral) affect scapular upward rotation. Design: Controlled laboratory study. Independent variables were the amounts of internal, external, and neutral glenohumeral rotation. The dependent variable was the amount of scapular upward rotation. Setting: Research laboratory. Participants: 40 subjects who were right-hand dominant, sedentary, and age 16 to 35 years. Main Outcome Measures: An inclinometer assessed scapular upward rotation with the 3 different positions of glenohumeral rotation in each 0°, 30°, 60°, and 90° of humeral elevation in the scapular plane. Results: Scapular upward rotation tended to increase with glenohumeral internal and external rotation, compared with neutral rotation in each degree of humeral elevation. This trend was seen on both right and left sides. Conclusions: Scapular upward rotation at different levels of humeral elevation in the scapular plane was affected by the positions of glenohumeral rotation. © 2006 Human Kinetics, Inc.

DOI

スケート選手の体力特性

片寄正樹

理学療法 = Journal of physical therapy 22 ( 1 ) 293 - 299 2005年01月

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スポーツ医学用動画像コラボレーションシステムの開発

津村宏, 清水健太郎, 片寄正樹

医療マネジメント学会雑誌 ( 日本医療マネジメント学会 ) 5 ( 4 ) 541 - 546 2005年

スポーツ医学分野での遠隔診断, リハビリテーションの指導, 症例検討会などでは, 動画像を共有資料する必要がある. しかしながら既存のインターネット用のテレビ会議システムは, パワーポイント, エクセルなどの資料を共有する機能を持っているが, 動画映像を共有する機能は無い. このためにわれわれは, 動画映像ファイルを各クライアントヘファイル転送し, 会議中は各クライアント間で動画像の再生制御コマンドを相互に転送することで, 各クライアントで同期して映像を見ることが出来る動画コラボレーションシステム「シンクロビジョンシステム」を開発した. 開発したシステムをインターネット上で実験運用した結果, 次の結果が得られた.(1) 峡帯域および広帯域でもコラボレーション時の動画像共有制御が可能である.(2) 多地点間で再生操作の競合制御を行わなくても問題は生じない.(3) 共有する動画ファイルを事前に転送する必要があり転送前に内容を吟味して必要最小限のファイルにする必要がある.

DOI CiNii

Anatomical compartmentalization of the human peroneus longus muscle in cadaver dissection

Taniguchi K, Katayose M, Noriyasu S

Bulletin of School of Health Sciences. Sapporo Medical University ( 札幌医科大学保健医療学部 ) 8 107 - 111 2005年 [査読有り]

Many skeletal muscles have been found to be composed of smaller portions of a muscle innervated by a primary muscle nerve branch called neuromuscular compartments. The purpose of this study was to identify the anatomical evidence for neuromuscular compartments of the human peroneus longus muscle. Eight legs from human cadavers donated were dissected. The architectural characteristics of muscle fiber direction and tendinous tissue were examined. The primary nerve branching pattern throughout the peroneus longus was also observed. The peroneus longus was found to have four distinct partitions. The superficial portion and deep portion within the muscle were separated by an aponeurosis that is continuous with the distal tendon. Furthermore, each of these both portions was partitioned into two portions by muscle fiber orientation. In addition, these architectural compartments of the muscle were congruent with compartments identified by innervation pattern. The present findings suggest that intramuscular compartments of the peroneus longus are anatomically defined. In future, this muscle's partitioning will not only lead to an anatomical foundation for the physiological study to elucidate the functional multiplicity of the peroneus longus, but also provide a scientific rationale for establishment of more specific protocols for rehabilitation of patients with the dysfunctional muscle and muscle atrophy.近年、多くの骨格筋が神経筋コンパートメントと呼ばれる要素から構成され、これらの筋区画は機能的な要求に応じて選択的に活動することが確認されつつある。本研究では、ヒト長腓骨筋の筋内コンパートメントを肉眼解剖学的に同定することを目的とした。筋標本は解剖実習用固定屍体の下腿8肢を使用し、筋線維走行、腱組織の位置関係および筋内の神経分岐様式を観察した。その結果、長腓骨筋は独立した神経枝の支配を受ける４つの区画を有することが認められた。筋内の浅部および深部区画は、停止腱から続く腱膜によって分離される。さらに、これらの両区画の各々が筋線維の走行により前部と後部区画に区分される。今回試みた解剖学的な筋のコンパートメント化は、長腓骨筋内に存在する機能的分化を示唆する。また、筋機能不全や筋萎縮を呈する患者に対して、この筋内コンパートメントを指標として画像検査や筋電図学的評価を行うことは、効率の良い最適な理学療法プログラムの構築に寄与すると考えられる。

DOI CiNii

インターネットを利用したスポーツ医科学サポートシステム構築に向けた評価実験

津村宏, 清水健太郎, 片寄正樹

医療マネジメント学会雑誌 ( 日本医療マネジメント学会 ) 5 ( 2 ) 354 - 357 2004年

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遠隔操作による動きの診断と理学療法 (特集動きを計測する--データ収集と処理の進歩)

片寄正樹

体育の科学 ( 杏林書院 ) 51 ( 8 ) 619 - 621 2001年08月

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足関節捻挫の理学療法効果検証に向けた準備

片寄正樹, 高橋小夜利, 中山正紀

理学療法 = Journal of physical therapy 17 ( 7 ) 671 - 676 2000年07月