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首页> 外文期刊>The European Journal of Neuroscience >Differential modulations of ipsilateral and contralateral beta (de)synchronization during unimanual force production
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Differential modulations of ipsilateral and contralateral beta (de)synchronization during unimanual force production

机译：单手部队生产过程中同侧和对侧β（去）同步的差异调制。

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摘要

Unilateral movement is usually accompanied by ipsilateral activity in the primary motor cortex (M1). It is still largely unclear whether this activity reflects interhemispheric 'cross-talk' of contralateral M1 that facilitates movement, or results from processes that inhibit motor output. We investigated the role of beta power in ipsilateral M1 during unimanual force production. Significant ipsilateral beta desynchronization occurred during continuous dynamic but not during static force production. Moreover, event-related time-frequency analysis revealed bilateral desynchronization patterns, whereas post-movement synchronization was confined to the contralateral hemisphere. Our findings indicate that ipsilateral activation is not merely the result of interhemispheric cross-talk but involves additional processes. Given observations of differential blood oxygen level-dependent responses in ipsilateral and contralateral M1, and the correlation between beta desynchronization and the firing rate of pyramidal tract neurons in contralateral M1 during movement, we speculate that beta desynchronization in contra- and ipsilateral M1 arises from distinct neural activation patterns.
机译：单侧运动通常伴有初级运动皮层（M1）的同侧活动。仍不清楚这种活动是否反映了对侧M1的半球间“串扰”，从而促进了运动，还是反映了抑制电机输出的过程。我们调查了单力生产过程中β力量在同侧M1中的作用。在连续动态过程中发生了重要的同侧β失步，但在静态力产生过程中没有发生。此外，与事件相关的时频分析揭示了双边去同步模式，而运动后同步则局限于对侧半球。我们的发现表明，同侧激活不仅是半球间串扰的结果，而且还涉及其他过程。鉴于观察到在同侧和对侧M1中存在不同的血氧水平依赖性反应，以及运动过程中对侧M1中β失步与锥体束神经元放电速率之间的相关性，我们推测对侧和同侧M1的β失步是由明显的神经激活模式。

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