[Purpose] The purpose of this study was to determine the activities of the muscles around the ankle joint during foot gripping. [Subjects] The subjects of this study were 17 healthy females. [Methods] We measured the maximum voluntary contraction (MVC) activities of the soleus muscle, the medial head of the gastrocnemius muscle, and the tibialis anterior muscle, and calculated %IEMG during foot gripping in 3 different ankle joint positions: 10° of plantar flexion, 0°, and 10° of dorsiflexion. [Results] The maximal force of foot gripping achived by the crural muscles in any ankle position was 30–50% IMEG of the MVC. Repeated analysis of variance showed that the %IEMG was significantly lower in 10°of dorsiflexion than in the other 2 positions for all muscles. [Conclusion] These results suggested that the crural muscles help the ankle joint by co-contracting during foot gripping.
（この研究の目的は、足趾把持時の足関節周囲筋の筋活動を明らかにすることである。対象は17人の健康な女性とした。ヒラメ筋、腓腹筋内側頭および前脛骨筋の最大随意収縮(MVC)を測定し、底屈10度、中間位、背屈10度の3つの異なる足関節角度条件で足趾把持時の%IEMGを算出した。結果、任意の足関節角度における足趾把持力の最大値時には、被験筋は30～50% の%IMEGであった。分散分析の結果、2つの足関節角度条件に比べて10度背屈位の%IEMGが有意に低下していた。）
25:1625-1627
Masayuki Soma, Shin Murata, Yoshihiro Kai, Hideyuki Nakae, Yosuke Satou
