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首页> 外文期刊>Journal of Neurophysiology >Corticomuscular coherence during bilateral isometric arm voluntary activity in healthy humans.
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Corticomuscular coherence during bilateral isometric arm voluntary activity in healthy humans.

机译：在健康人的双边等距手臂自愿活动过程中的皮层相干性。

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摘要

Bilateral voluntary contractions involve functional changes in both primary motor cortices. We investigated whether a voluntary contraction controlled by one hemisphere can influence oscillatory processes contralaterally. Corticomuscular coherence was calculated between EEG recorded over the motor cortex hand representation and electromyogram from the first dorsal interosseous muscle when the nondominant hand performed a precision grip task. The dominant arm remained at rest or performed a finger abduction or an elbow flexion task at 10, 40, and 70% of maximal isometric voluntary contraction (MVC). Mean coherence in the 15- to 30-Hz range in the hand performing a precision grip increased during 40% (by 72%) and 70% (by 73%) but not during 10% of MVC in the finger abduction task. Similarly, in the elbow flexion task, mean coherence increased during 40% (by 40%) and 70% (by 48%) but not during 10% of MVC. No differences were observed between the increments in coherence between the finger abduction and elbow flexion tasks at a given force level. We speculate that these results reflect the increased complexity of controlling a fine motor task with one hand while performing a strong contraction with the contralateral hand and suggest that increased oscillatory corticomuscular coupling may contribute to successful task performance.
机译：双边自愿性收缩涉及两个原发性运动皮质的功能改变。我们调查了由一个半球控制的自愿收缩是否可以对侧影响振荡过程。当非优势手执行精确的抓握任务时，计算出运动皮层手代表的记录的脑电图和第一背骨间肌的肌电图之间的皮层相干性。优势臂保持静止，或在最大等距自主收缩（MVC）的10％，40％和70％处进行手指外展或肘部屈曲任务。在手指外展任务中，执行精确抓握的手在15Hz至30Hz范围内的平均相干性在MVC的40％（增加72％）和70％（73％）期间增加，但没有增加。同样，在肘部屈曲运动中，平均连贯性在MVC的40％（增加40％）和70％（增加48％）期间增加，但没有增加。在给定的力水平下，在手指外展和肘部屈曲任务之间的连贯性增量之间未观察到差异。我们推测这些结果反映出用一只手控制精细的运动任务而用对侧的手进行强力收缩会增加复杂性，并表明增加的振荡皮质/小腿耦合可能有助于成功完成任务。

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