Changes in aponeurotic dimensions upon muscle shortening: In vivo observations in man

Constantinos N. Maganaris, Yasuo Kawakami, Tetsuo Fukunaga

研究成果: Article査読

30 被引用数 (Scopus)


Aponeurotic deformation measurements have traditionally been taken by loading dissected muscles; thus the values obtained may not reflect in vivo function. In the present study, we estimated dimensional changes in the central aponeurosis of the intact human tibialis anterior muscle upon loading induced by muscle contraction. Measurements were taken in seven males, and involved real-time ultrasound scanning of the tibialis anterior muscle at 30° of plantarflexion at rest and during isometric dorsiflexion maximum voluntary contraction (MVC). At each contraction state, the length of the aponeurosis, the width along its length, and its area were estimated from sagittal-plane and axial-plane sonographs. In the transition from rest to MVC, the length of the aponeurosis increased by 7% (P < 0.05), its width increased by up to 21% (P < 0.05), and its area increased by 17% (P < 0.05). These results indicate that the in vivo tibialis anterior aponeurosis behaves as a compliant material upon active muscle shortening. The methodology employed allows cross-sectional and longitudinal design investigations, circumventing the problems associated with epimysial removal under in vitro experimental conditions.

ジャーナルJournal of Anatomy
出版ステータスPublished - 2001

ASJC Scopus subject areas

  • 解剖学
  • 生態、進化、行動および分類学
  • 組織学
  • 分子生物学
  • 発生生物学
  • 細胞生物学


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