title: The Activities of the Muscles around the Ankle Joint during Foot-gripping are Affected by the Angle of the Ankle.
abstract: [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.
authors.affiliation: Course of Rehabilitation Department of Health Sciences, Tohoku Fukushi University: 1-8-1 Kunimi, Aoba-ku, Sendai-city 981-8522, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Soma
authors.affiliation: Course of Physical Therapy Department of Health Sciences, Kyoto Tachibana University, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Murata
authors.affiliation: Course of Physical Therapy Department of Health Sciences, Kyoto Tachibana University, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kai
authors.affiliation: Course of Rehabilitation Department of Health Sciences, Tohoku Fukushi University: 1-8-1 Kunimi, Aoba-ku, Sendai-city 981-8522, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Nakae
authors.affiliation: Course of Rehabilitation Department of Health Sciences, Tohoku Fukushi University: 1-8-1 Kunimi, Aoba-ku, Sendai-city 981-8522, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Satou
keywords: Angle of the ankle joint; Foot-gripping strength; Muscle activity