Differential angle-dependent modulation of the long-latency stretch reflex responses in elbow flexion synergists

Shin Ichiroh Yamamoto, Kimitaka Nakazawa, Hideo Yano, Tatsuyuki Ohtsuki

研究成果: Article

9 引用 (Scopus)

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We determined the effect of elbow joint angle on the short-(M1) and long-latency stretch reflex (M2 and M3) responses of the elbow flexion synergists, the brachioradialis (BR), and the biceps brachii (BB), during weak isometric elbow flexion tasks. The elbow joint angle was 35,75 and 115°(full-extension angle was 0°), and the muscle contraction level was 0,3 and 6% of maximum voluntary contraction (MVC) of the BR. In BR, the M1, M2 and M3 responses were significantly greater at 75 and 115°than at 35°. On the other hand, in BB, the M2 response was significantly greater at 35°than at 75 and 115°, while the M1 and M3 responses were not significantly different among the elbow joint angles. These results indicated that the stretch reflex responses of BR might be dependent on the changes of muscle length in stretch stimulus, while the M2 response of BB might not be dependent on the actual stimulus intensity. Therefore, we concluded that the M2 of BB might be modulated selectively by a higher reflex center in accordance with relationships of the mechanical advantages between synergistic muscles. Copyright (C) 2000 Elsevier Science Ltd.

元の言語English
ページ(範囲)135-142
ページ数8
ジャーナルJournal of Electromyography and Kinesiology
10
発行部数2
DOI
出版物ステータスPublished - 2000 4 1
外部発表Yes

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

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