Time course of the changes in MEP amplitude (Experiment 1).

<p>(A) The traces show the typical MEP amplitudes for each FDI and EMG activity in the left FDI from one representative subject. (B) The overall mean time courses of the changes in MEP amplitude (n = 10, ±SE) evoked in the ipsi- (open circles) and contra-FDI (closed circles) muscles by a single TMS as a percentage of the control values. The asterisks indicate a significant difference from EMG onset (*p<0.05). The daggers indicate a significant difference from the 20 ms EMG onset-TMS interval (‡p<0.05) or 40 ms EMG onset-TMS interval (†p<0.05).