Effects of Passive Ankle and Knee Joint Motions on the Length of Fascicle and Tendon of the Medial Gastrocnemius Muscle

• Wakahara Taku

  Graduate School of Human Sciences, Waseda University

• Ushiyama Junichi

  Department of Life Sciences (Sports Sciences), The University of Tokyo

• Kanehisa Hiroaki

  Department of Life Sciences (Sports Sciences), The University of Tokyo

• Kawakami Yasuo

  Faculty of Sport Sciences, Waseda University

• Fukunaga Tetsuo

  Faculty of Sport Sciences, Waseda University

抄録

The purpose of this study was to investigate the effects of passive ankle and knee joint motions on the length of fascicle and tendon of the gastrocnemius muscle. The ankle joint was passively moved from maximal dorsiflexed position to maximal plantar flexed position, while the knee joint was fixed at 0° (fully extended position). Also, the knee joint was passively extended from 90° to 0°, while the ankle joint was fixed at 0° (neutral position). In each test condition, lengths of fascicle and external tendon of the medial gastrocnemius were measured by ultrasonography. The length of external tendon was significantly changed by the ankle joint motion, but not by the knee joint motion. This demonstrates that the length of the external tendon distal to the muscle belly is influenced only by the angle changes of the joint distal to the gastrocnemius muscle. The change in fascicle length during the knee joint motion was significantly larger than during the ankle joint motion in spite of a similar length change of total muscle-tendon complex between the two motions. This demonstrates that fascicles located proximally to the external tendon are more influenced by the angle changes of the joint proximal to the gastrocnemius muscle. These results reveal that angle changes of each joint located in the proximal and distal parts of a biarticular muscle have different effects on the length of fascicle and external tendon.

収録刊行物

• Ｉｎｔ．　Ｊ．　Ｓｐｏｒｔ　Ｈｅａｌｔｈ　Ｓｃｉ．

  Ｉｎｔ．　Ｊ．　Ｓｐｏｒｔ　Ｈｅａｌｔｈ　Ｓｃｉ． 3 75-82, 2005

  一般社団法人 日本体育・スポーツ・健康学会

キーワード

• fascicle
• external tendon
• knee joint
• ankle joint
• medial gastrocnemius muscle

詳細情報

• CRID: 1390001205286861568
• NII論文ID: 130000069555
• DOI: 10.5432/ijshs.3.75
• ISSN: 18804012
• ISSN: 13481509
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可