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首页> 外文期刊>Journal of Neurophysiology >Effect of transcranial magnetic stimulation on bimanual movements.
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Effect of transcranial magnetic stimulation on bimanual movements.

机译：经颅磁刺激对双手运动的影响。

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摘要

Transcranial magnetic stimulation (TMS) of the motor cortex can interrupt voluntary contralateral rhythmic limb movements. Using the method of resetting index types of bimanual movements. Six normal subjects participated. For unimanual movement, each subject tapped either the right or left index finger at a comfortable rate. For bimanual movement, index fingers of both hands tapped in the same (in-phase) direction or in the opposite (antiphase) direction. TMS was applied to each hemisphere separately at various intensities from 0.5 to 1.5 times motor threshold (MT). TMS interruption of rhythm was quantified by RI. For the unimanual movements, TMS disrupted both contralateral and ipsilateral rhythmic hand movements, although the effect was much less in the ipsilateral hand. For the bimanual in-phase task, TMS could simultaneously reset the rhythmic movements of both hands, but the effect on the contralateral hand was less and the effect on the ipsilateral hand was more compared with the unimanual tasks.Similar effects were seen from right and left hemisphere stimulation. TMS had little effect on the bimanual antiphase task. The equal effect of right and left hemisphere stimulation indicates that neither motor cortex is dominant for simple bimanual in-phase movement. The smaller influence of contralateral stimulation and the greater effect of ipsilateral stimulation during bimanual in-phase movement compared with unimanual movement suggest hemispheric coupling. The antiphase movements were resistant to TMS disruption, and this suggests that control of rhythm differs in the 2 tasks. TMS produced a transient asynchrony of movements on the 2 sides, indicating that both motor cortices might be downstream of the clocking command or that the clocking is a consequence of the 2 hemispheres communicating equally with each other.
机译：运动皮质的经颅磁刺激（TMS）可以打断自愿的对侧节律性肢体运动。使用重置双手运动的索引类型的方法。六名正常受试者参加。对于单手运动，每个受试者以舒适的速度轻击右或左食指。对于双手运动，两只手的食指在相同（同相）方向或相反（反相）方向上敲击。将TMS以0.5到1.5倍运动阈值（MT）的不同强度分别应用于每个半球。 TMS的节奏中断由RI量化。对于单手运动，TMS会破坏对侧和同侧有节奏的手部运动，尽管对同侧手的影响要小得多。对于单手阶段任务，TMS可以同时重置双手的节奏运动，但与单手任务相比，对侧手的影响较小，对同侧手的影响更大。左半球刺激。 TMS对双向反相任务几乎没有影响。左右半球刺激的效果相同，表明运动皮层都不是简单的两手同相运动的主导。与单手运动相比，双手同相运动过程中对侧刺激的影响较小，同侧刺激的影响较大，这表明半球耦合。反相运动可抵抗TMS中断，这表明在两个任务中节律的控制不同。 TMS在两侧产生了短暂的运动异步，这表明两个运动皮质可能在计时命令的下游，或者计时是两个半球彼此平等通信的结果。

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