低(1Hz)和高(15Hz)频率重复经颅磁刺激视觉皮层对脑电图的影响:麻醉猫的研究

N. Espinosa, C. Labra, C. Rivadulla, J. Mariño, J. Cudeiro
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引用次数: 4

摘要

在这里,我们证实了我们早期的发现,即在麻醉猫的初级视觉皮层上进行1Hz的rTMS,已知会导致皮层的抑制,导致脑电图的慢波δ波段的功率增加。我们还证明了1Hz rTMS的这些抑制作用可以通过单细胞水平上时空感受野参数的变化来测量。我们扩展了这些观察结果,表明在15Hz的更高频率的皮层刺激具有相反的效果,减少delta活动,这也伴随着theta, alpha和beta波段的显着增加。这种高度可重复的脑电图变化可作为一种简单的标记物,用于预测已知依赖于刺激频率的抑制或兴奋性rTMS效应。
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Effects on EEG of Low (1Hz) and High (15Hz) Frequency Repetitive Transcranial Magnetic Stimulation of the Visual Cortex: A Study in the Anesthetized Cat
Here we confirm our earlier findings that showed 1Hz rTMS over the primary visual cortex of the anesthetized cat, known to cause inhibition of the cortex, induces an increase in power in the slow, delta band of the EEG. We also demonstrate that these inhibitory effects of 1Hz rTMS may be measured as changes of spatiotemporal receptive field pa- rameters at the single cell level. We extend these observations to show that higher frequency stimulation of the cortex at 15Hz has the opposite effect of decreasing delta activity, which was also accompanied by significant increases in theta, alpha and beta bands. This highly reproducible EEG change may be useful as a simple marker to predict inhibitory or ex- citatory rTMS effects known to be dependent upon stimulation frequency.
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