Contraction Dynamics of the Triceps Surae during Gait Initiation

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  • SATO Takanori
    Department of Physical Therapy, International Institute of Medical Therapy
  • KUDO Shintaro
    Department of Physical Therapy, Morinomiya University of Medical Sciences Morinomiya University of Medical Sciences Postgraduate Education Center Department of Graduate School of Health Science, Morinomiya University of Medical Sciences

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Other Title
  • 歩行開始時における下腿三頭筋の収縮動態
  • ホコウ カイシジ ニ オケル カタイ サントウキン ノ シュウシュク ドウタイ

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Description

[Purpose] On the initiation of gait, backward movement of the center of foot pressure (COP) is caused by reduced activity of the triceps surae muscle. The purpose of this study was to consider the dynamics of the triceps surae muscle at gait initiation. [Subjects] Twenty-two healthy adults without orthopedic disease in the lower limbs. [Methods] A force plate measuring COP distribution, a B-mode ultrasound imaging system and a video camera were synchronized, and the dynamics of the triceps surae muscles at gait initiation were investigated as the change in the length of muscle fiber bundles between quiet-standing and gait initiation. [Results] It was found that the triceps surae muscle stretched by about 10 mm. [Conclusion] The results suggest the triceps surae muscle stretches when COP moves backward, and that it is necessary to include this dynamic when performing therapy for gait initiation. <br>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 31 (3), 377-380, 2016

    The Society of Physical Therapy Science

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