Fatigue-related changes in fascicle-tendon geometry over repeated contractions: Difference between synergist muscles

Naotoshi Mitsukawa, Norihide Sugisaki, Hiroaki Kanehisa, Tetsuo Fukunaga, Yasuo Kawakami*

*この研究の対応する著者

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Fatigue-induced changes in force production of synergist muscles were evaluated through observation of fascicle-tendon geometry and electromyography (EMG). Seven subjects performed 60 maximal isometric plantar flexions intermittently. No statistically significant intermuscle difference was observed in the decrease of mean EMG amplitudes or mean power frequency for the medial gastrocnemius (MG) and soleus (SOL) muscles. The tendon elongation of MG significantly decreased after the 19th contraction, and MG fascicle length increased after the 29th contraction, while SOL fascicle and tendon length did not change except for the last contraction. The declines in torques were highly correlated with the increase of MG fascicle length and decrease in tendon elongation in each subject, while no consistent relationship was found for SOL. These results suggest that changes in force-production of MG and SOL over repeated contractions differ, which is reflected in fascicle-tendon geometry.

本文言語English
ページ(範囲)395-401
ページ数7
ジャーナルMuscle and Nerve
40
3
DOI
出版ステータスPublished - 2009 9月 1

ASJC Scopus subject areas

  • 生理学
  • 臨床神経学
  • 細胞および分子神経科学
  • 生理学(医学)

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