Figure 6. Spatiotemporal TMS-evoked current maps during wakefulness and NREM sleep in two subjects.
The black traces represent the global mean field power at each time point; when the black line is above the horizontal yellow line, the global power of the evoked field was significantly higher (>6 SD) than the mean prestimulus level. For each significant time sample, maximum current sources were plotted on the cortical surface and color-coded according to their latency of activation (light blue, 0 ms; red, 300 ms). The yellow cross indicates the location of the TMS target on the cortical surface. (Modified with permission from Massimini et al, 2005.)