Bilateral motor unit synchronization is functionally organized

被引：26

作者：

Boonstra, T. W. ^{[1
]}

Daffertshofer, A. ^{[1
]}

van As, E. ^{[1
]}

van der Vlugt, S. ^{[1
]}

Beek, P. J. ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Fac Human Movement Sci, Inst Fundamental & Clin Human Movement Sci, NL-1081 BT Amsterdam, Netherlands

来源：

EXPERIMENTAL BRAIN RESEARCH | 2007年 / 178卷 / 01期

关键词：

EMG coherence; common drive; motor overflow; muscle fatigue; physiological tremor;

D O I：

10.1007/s00221-006-0713-2

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

To elucidate the neural interactions underlying bimanual coordination, we investigated in 11 participants the bilateral coupling of homologous muscles in an isometric force production task involving fatiguing elbow flexion and extension. We focused on changes in motor unit (MU) synchronization as evident in EMG recordings of relevant muscles. In contrast to a related study on leg muscles, the arm muscles did not exhibit MU synchronization around 16 Hz, consistent with our hypothesis that 16 Hz MU synchronization is linked to balance maintenance. As expected, bilateral MU synchronization was apparent between 8 and 12 Hz and increased with fatigue and more strongly so for extensor than for flexor muscles. MU synchronization in that frequency band is interpreted in terms of common bilateral input and substantiates the idea that common input is functionally organized. Since these findings are consistent with the literature on mirror movements, they suggest that both phenomena may be related.

引用

页码：79 / 88

页数：10

共 70 条

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