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首页> 外文期刊>The European Journal of Neuroscience >Suppression of ipsilateral motor cortex facilitates motor skill learning.
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Suppression of ipsilateral motor cortex facilitates motor skill learning.

机译：抑制同侧运动皮层有助于运动技能的学习。

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摘要

The primary motor cortex (M1) plays a critical role in early aspects of motor skill learning. Given the notion of inter-hemispheric competition, unilateral disruption of M1 may increase excitability of the unaffected motor cortex and thus improve motor learning with the ipsilateral hand. We applied slow-frequency repetitive transcranial magnetic stimulation (rTMS) before the initiation of practice of a simple motor skill. Participants were randomly divided into three stimulation groups: (i) ipsilateral M1; (ii) contralateral M1; and (iii) Cz (control site). The mean execution time and error rate were recorded in four sessions distributed over 2 days. Disruption of M1 with rTMS slowed down skill acquisition with the contralateral hand, albeit non significantly, but paradoxically enhanced learning with the ipsilateral hand. This was evidenced by a significant decrease of execution time at the end of day 1 in the group that received rTMS over the ipsilateral M1 compared with both control groups (Cz and contralateral M1 stimulation). This supports the notion of inter-hemispheric competition and provides novel insights that may be applicable to neurorehabilitation.
机译：初级运动皮层（M1）在运动技能学习的早期阶段起着至关重要的作用。考虑到半球间竞争的概念，M1的单方面破坏可能会增加未受影响的运动皮层的兴奋性，从而改善同侧手的运动学习。在开始简单的运动技能练习之前，我们应用了低频重复经颅磁刺激（rTMS）。参与者被随机分为三个刺激组：（i）同侧M1; （ii）对侧M1; （iii）Cz（控制站点）。在为期2天的四个会话中记录了平均执行时间和错误率。用rTMS破坏M1会减慢对侧手的技能学习，尽管效果不明显，但反而会增强对侧手的学习。与同对照组（Cz和对侧M1刺激）相比，通过同侧M1接受rTMS的组在第1天结束时执行时间明显减少，这证明了这一点。这支持了半球间竞争的概念，并提供了可能适用于神经康复的新颖见解。

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