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首页> 外文期刊>The European Journal of Neuroscience >Enhancement of long-range EEG coherence by synchronous bifocal transcranial magnetic stimulation.
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Enhancement of long-range EEG coherence by synchronous bifocal transcranial magnetic stimulation.

机译：同步双焦点经颅磁刺激增强远程脑电图的连贯性。

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摘要

Interregional coupling of distant brain regions can be measured by electroencephalographic (EEG) coherence reflecting the spatial-temporal correlation between two oscillatory signals. It has been suggested that this coherence in activity is a signature of functional integration of multimodal neuronal networks. Repetitive transcranial magnetic stimulation (rTMS) is a well-established technique for non-invasive cortical stimulation. Its modulating effects outlast the train of stimulation and affect behavior. In the present study, we tested the hypothesis that cortico-cortical coherence between distant brain areas can be selectively enhanced by synchronous bifocal rTMS. Cortico-cortical coherence was assessed in 16 healthy human subjects before and after three trains of synchronous high-frequency (10 Hz) rTMS to the left primary motor cortex and the visual cortex at the occipital pole simultaneously. Stimulation of the left M1 alone served as the control condition. Coherence and spectral power were measured between these areas on the stimulated and the homologue contralateral side. Synchronous bifocal rTMS induced an increase of interregional coupling in the alpha and lower beta band on the stimulated side without effects on spectral power. These data indicate that synchronous bifocal rTMS is a feasible technique for selective modulation of interregional EEG coherence. Furthermore, they raise the hypothesis that interventional enhancement of long-range coherence may effectively modulate interregional integration with behavioral consequences.
机译：可以通过反映两个振荡信号之间的时空相关性的脑电图（EEG）相干性来测量远距大脑区域的区域间耦合。已经提出，活动的这种一致性是多峰神经元网络功能整合的标志。重复经颅磁刺激（rTMS）是一种成熟的无创皮层刺激技术。它的调节作用比刺激的作用持久，并影响行为。在本研究中，我们测试了以下假设：同步双焦点rTMS可以选择性增强远距大脑区域之间的皮质-皮质相干性。在16个健康的人类受试者中，在同时对左初级运动皮层和枕骨视皮层进行三列同步高频（10 Hz）rTMS训练之前和之后，评估了皮层皮质的连贯性。单独刺激左M1作为对照条件。在受激和同侧对侧的这些区域之间测量相干性和光谱功率。同步双焦点rTMS导致受激侧的α和较低β带中的区域间耦合增加，而对频谱功率没有影响。这些数据表明，同步双焦点rTMS是一种可行的技术，可选择性调制区域间EEG相干性。此外，他们提出了这样的假说，即介入性增强远距离连贯性可以有效地调节区域间的整合并产生行为后果。

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