EMG Activity of the Popliteus Muscle during Walking and Standing

DOI IR 11 References
  • ONISHI Hideaki
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • YAGI Ryo
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • OYAMA Mineo
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • MATSUKI Narihiro
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • IHASHI Kouji
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • HANDA Yasunobu
    Dept.of Restorative Neuromuscular Surgery and Rehabilitation, Tohoku University Graduate School of Medicine
  • IKEDA Tomozumi
    The Polytechnic University, Rehabilitation Engineering

Bibliographic Information

Other Title
  • 歩行および立位保持中の膝窩筋筋活動について

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Description

The purposes of this study were to detect the electromyographic activity of the popliteus muscle during walking and standing, and to clarify the popliteus muscle function. The healthy male volunteers participated in this study. The electromyographic activity during walking and standing at 0, 30, 60 and 90 degrees of knee flexion was recorded. Bipolar fine wire electrode was inserted into the right popliteus muscle, and electrical stimulation was used to confirm the location of the electrode. The EMG raw data were rectified and averaged, then the smoothed EMG was normalized by the value that was obtained during the maximum isometric internal rotation of the tibia. <br>The popliteus muscle showed some activity in each phase of the gait cycle. Within this continuum, however, there were three phases of peak electromyographic activity. These peaks occurred at loading response, preswing and terminal swing phases. The activity of the popliteus muscle during standing increased with the increase of the knee flexion in standing. These data suggested that the popliteus muscle help to protect the knee from the hyperextension during terminal swing and loading response phases of the gait cycle, and may assist the initiation of knee flexion at preswing phase. In addition, the popliteus muscle could increase its activity in an attempt to limit the anterior tibial shearing during standing with knee flexion.

Journal

  • Physical Therapy Japan

    Physical Therapy Japan 26 (5), 226-230, 1999-07-31

    Japanese Society of Physical Therapy

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