Different contraction pattern of lower leg muscle fiber between swaying and tiptoe standing in human upright posture

S. Yamamoto, C. Shimizu, H. Yamamoto, N. Sasagawa, T. Miyoshi, H. Koyama, T. Komeda

研究成果: Conference contribution

抄録

In recent studies, it is shown that gastrocnemius (GAS) muscle fiber movements in upright standing were paradoxical as compared to the movement of whole muscle length depended on the ankle joint movement. We hypothesized these muscle fiber movement depend on the position of the center of mass (COM) relative to the center of rotation of the ankle joint. The purpose of this study was to examine the change of muscle fiber length in GAS and tibialis anterior (TA) muscles while upright standing postures: swaying anterior-posterior and standing tiptoe-heel. Ultrasonography of the GAS and TA was recorded to detect the change of muscle fiber length in vivo. The center of pressure and the ankle joint angular displacements were recorded to use as visual feedback signals in two postural tasks. When subjects swayed their body in anterior-posterior direction repeatedly, the relationship between the whole muscle length and the muscle fiber length was an anti-phasic pattern in both muscles. However, when subjects stood on their tiptoe/heel repeatedly, the relationship between the whole muscle length and the muscle fiber length was an in-phasic pattern. These results suggest that the changes in the muscle fiber length of the lower leg while standing upright depend on the COM position relative to the center of rotation of the ankle joint.

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2128-2132
ページ数5
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

フィンガープリント

「Different contraction pattern of lower leg muscle fiber between swaying and tiptoe standing in human upright posture」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル