1. The muscle activity patterns on hip muscles of the dominant lower extremity during pitching motion : EMG analysis
- Author
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Yoshikazu, Azuma, Toru, Morihara, Tomoyuki, Matsui, Kazuya, Seo, Machiko, Hiramoto, Noriyuki, Kida, Yosuke, Yamada, Yasuo, Nakamura, Tatsuya, Hojo, Motoyuki, Horii, and Toshikazu, Kubo
- Subjects
pitching motion ,投球動作 ,electromyography ,494.77 ,muscle activation pattern ,筋活動パターン ,hip joint ,股関節 ,筋電図 - Abstract
投球障害は投球側下肢関節機能低下によって引き起こされることも多く,下肢関節機能の評価は重要である.しかし,投球動作中の下肢における経時的な筋活動パターンは不明なため,筋電図と三次元動作解析装置を用いて検討した.大腿筋膜張筋と中殿筋の筋活動は並進運動直前にピークを示した.長内転筋と大腿直筋の筋活動は非投球側下肢の接地直後にピークを示した.長内転筋は過剰な並進運動の制動と,骨盤の回旋に作用すると考えられる., The evaluation of lower extremity function is important for throwing disorders. The purpose of this study was to investigate the muscle activation patterns around hip during pitching motion by three-dimensional motion analysis system synchronized with surface electromyography. The timing of peak tensor fasciae latae and gluteus medius activities was before maximum knee elevation of non-dominant lower extremity in wind-up phase. The timing of peak adductor longus(AL) and rectus femoris(RF) activities was immediately after non-dominant foot contact. This study suggested that AL could put a brake on moving body to the catcher excessively and help the pelvis rotating in the direction of throwing.
- Published
- 2014