The activation time-course of contractile elements estimated from in vivo fascicle behaviours during twitch contractions

Toshiaki Oda*, Ryutaro Himeno, Dean C. Hay, Hiroaki Kanehisa, Tetsuo Fukunaga, Yasuo Kawakami

*この研究の対応する著者

研究成果: Article査読

抄録

To better understand the cascade from neural activation up to force production within in vivo contracting muscle-tendon units, we estimated activation of contractile elements from experimentally measured human fascicle length change and force using a Hill-type muscle model. The experiment was conducted with respect to twitch contractions of the tibialis anterior muscle at three joint angles. As muscle contractile element force is a function of its length and velocity, the activation of contractile elements was calculated using a Hill-type muscle model and measured data. The results were able to reproduce the continuous rising activation of contractile elements after termination of electromyographic activity, the earlier shift of peak activation in time compared to twitch force, and the differences in time-course activation at three different joint angles. These findings are consistent with the predicted change in the activation of contractile elements from previous reports. Also, the results suggest that the time-course of the activation of contractile elements was greatly influenced by the change in force generating capacities related to both length and velocity, even in fixed end contractions, which could result from muscle-tendon interaction.

本文言語English
ページ(範囲)1233-1241
ページ数9
ジャーナルJournal of sports sciences
31
11
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 整形外科およびスポーツ医学
  • 理学療法、スポーツ療法とリハビリテーション

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