In vivo fascicle behavior of synergistic muscles in concentric and eccentric plantar flexions in humans

Kentaro Chino, Toshiaki Oda, Toshiyuki Kurihara, Toshihiko Nagayoshi, Kohki Yoshikawa, Hiroaki Kanehisa, Tetsuo Fukunaga, Senshi Fukashiro, Yasuo Kawakami*

*この研究の対応する著者

研究成果: Article査読

35 被引用数 (Scopus)

抄録

Ultrasonography was used to directly measure in vivo fascicle behavior of the medial gastrocnemius (MG) and soleus (SOL) muscles while the subjects (n = 6 men) performed maximal voluntary concentric and eccentric plantar flexions at 60, 120, 180 and 240 deg/s. Fascicle shortening and lengthening velocities of MG, obtained from fascicle length changes over time, were significantly higher than those of SOL at ±120, ± 180 and +240 deg/s, possibly reflecting physiological and mechanical differences between these muscles. On the other hand, the effective fascicle shortening and lengthening velocities, defined as the velocities in the longitudinal direction of muscle belly, were not significantly different between MG and SOL. This could be due to difference in fascicle architecture and/or the existence of mechanical linkages between these muscles. Moreover, when the contribution of tendinous tissues to muscle-tendon complex length change was determined from fascicle length, pennation angle, moment arm and joint angle, it accounted for approximately 50% in both concentric and eccentric trials, but showed considerable intra-subject variations. This result quantifiably demonstrates the importance of tendinous tissues in isokinetically controlled joint movements.

本文言語English
ページ(範囲)79-88
ページ数10
ジャーナルJournal of Electromyography and Kinesiology
18
1
DOI
出版ステータスPublished - 2008 2

ASJC Scopus subject areas

  • 神経科学(その他)
  • 生物理学
  • 臨床神経学

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