TMS train effects on the TEP
CORTEX
First we asked whether there was a significant change in the local sensor-space TEP amplitude after different types of TMS trains (active vs. sham) and using different post-train probe latencies (500 ms, 2000 ms). This analysis revealed that single trains of left dlPFC TMS did not affect the amplitude of the TEP based on typical response metrics (Fig. We next investigated the TEPs from non-local ROIs, at regions expected to be connected to the stimulation site, and quantified the effects of stimulation type (active, sham TMS trains) and probe latency (early, late probes). To do so, we calculated the global mean field amplitude (GMFA, using all electrodes) and local mean field amplitude (LMFA) in regions of interest (ROIs) farther from the site of stimulation (right frontal, left parietal, right parietal; Fig. TMS trains reduce cortical excitability in the right frontal cortex. (