Influence of Hip External Rotators during Hip Flexion

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Other Title
  • 健常人における股関節外旋筋群が股関節屈曲に及ぼす影響
  • ケンジョウジン ニ オケル コカンセツ ガイセンキングン ガ コカンセツ クッキョク ニ オヨボス エイキョウ

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Description

The purpose of this study was to investigate the influence of extension of hip external rotators on passive hip flexion. Hip flexion angle was measured in sixty normal healthy volunteers (thirty females and thirty males) with their hip joint rotated internally/externally in the saggital plane. Flexion angle decreased significantly in conjunction with increasing internal rotational angle (p<0.001). The hip flexion angle of a donated fresh cadaver was measured after cutting each hip posterior muscle in turn. The flexion angle was particularly increased after cutting the piriformis and obturator internus muscles. Because both the piriformis and obturator internus muscles are hip external rotators, we concluded that these muscles restrict hip flexion. Therefore, in the treatment of restricted hip flexion, the range of internal rotation should also be taken into consideration.<br>

Journal

  • Rigakuryoho Kagaku

    Rigakuryoho Kagaku 23 (2), 323-328, 2008

    The Society of Physical Therapy Science

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