Changes of muscle fiber length in vivo during walking as revealed by ultrasound images

N. Sasagawa, T. Miyoshi, S. I. Yamamoto

研究成果: Conference contribution

抄録

The objective of this study was to investigate our hypothesis involving treadmill walking as revealed by time series of ultrasound images. The hypothesis is that the changes in the length of muscle fiber (MFL) of the triceps surae muscle depend on the position of the center of mass (COM) relative to the ankle joint center of rotation. Seven healthy subjects participated in this experiment. The time series of ultrasound images in MG and the joint angular displacements in the hip, knee, and ankle were recorded while the subjects walked on a treadmill at speeds of 3.0 and 4.0 km/h. The MFL in MG was lengthened at the early stance phase and shortened at the late stance phase. Namely, the changes in the MFL of MG while treadmill walking followed our hypothesis, which was demonstrated while standing upright. These results suggest that the propulsive torque around the ankle joint is controlled by the shortening of the MFL in MG, whereas the MG muscle was in the eccentric contraction phase.

本文言語English
ホスト出版物のタイトル4th European Conference of the International Federation for Medical and Biological Engineering - ECIFMBE 2008
ページ2113-2115
ページ数3
DOI
出版ステータスPublished - 2008
イベント4th European Conference of the International Federation for Medical and Biological Engineering, ECIFMBE 2008 - Antwerp, Belgium
継続期間: 2008 11 232008 11 27

出版物シリーズ

名前IFMBE Proceedings
22
ISSN(印刷版)1680-0737

Conference

Conference4th European Conference of the International Federation for Medical and Biological Engineering, ECIFMBE 2008
国/地域Belgium
CityAntwerp
Period08/11/2308/11/27

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 生体医工学

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