Evaluation of a Surface Electromyogram Frequency Analysis Method for Muscle Fiber Evaluation in the Gastrocnemius Muscle

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  • MORI Takuya
    Department of Rehabilitation, Hanna Central Hospital Department of Molecular Pathology, Graduate School of Medicine, Nara Medical University
  • MIYAGAWA Yoshihiro
    Department of Rehabilitation, Hanna Central Hospital Department of Molecular Pathology, Graduate School of Medicine, Nara Medical University
  • OKU Kousuke
    Department of Sports Orthopedic, Graduate School of Medicine, Nara Medical University Department of Physical Therapy, Faculty of Rehabilitation, Shijonawate Gakuen University
  • HASHIMOTO Masashi
    Department of Rehabilitation, Hanna Central Hospital
  • MORII Yuta
    Department of Rehabilitation, Hanna Central Hospital
  • KOBAYASHI Isao
    Department of Rehabilitation, Nara Professional Training College of Rehabilitation
  • KAWAHARA Isao
    Department of Rehabilitation, Hanna Central Hospital Department of Molecular Pathology, Graduate School of Medicine, Nara Medical University

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Other Title
  • 腓腹筋の筋線維評価における表面筋電図周波数解析方法の検討
  • ヒフクキン ノ キン センイ ヒョウカ ニ オケル ヒョウメンキンデンズ シュウハスウ カイセキ ホウホウ ノ ケントウ

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Abstract

[Purpose] The purpose of this study was to evaluate a method assessing muscle fiber type using frequency analysis of surface electromyograms of the gastrocnemius muscle. [Participants and Methods] Twenty-four healthy adults participated in this study. Voluntary contraction (VC) and maximum voluntary contraction (MVC) of the gastrocnemius muscle were measured using surface electromyograms, and analyzed using power spectrum analysis in the 0 to 260 Hz frequency range. The results were compared with the muscle fiber composition of the gastrocnemius muscle. [Results] No significant difference in frequency distribution between VC and MVC was found. The fiber composition of the gastrocnemius muscle obtained by frequency analysis was Type I, 47.12%, and Type II, 52.87%. [Conclusion] The frequency analysis method of this study showed that the gastrocnemius muscle has a constant frequency pattern regardless of the contraction strength.

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 33 (5), 779-782, 2018

    The Society of Physical Therapy Science

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