Figure 2
Impact of active vs. sham, rhythmic vs. random, right FEF stimulation on power. (A) Topographical maps representing power at 30 Hz during the [−133 0] ms pre-target onset time-window. The location of electrode FC2 (closest to the stimulated right FEF site), is indicated with a red or white open circle. On the statistical maps, electrodes from the topographic views for which EEG signals proved significantly different between conditions are signaled with bold black dots. Notice the increase of 30 Hz power for active vs. sham stimulation. (B) Event-related spectrum perturbation (ERSP) calculated for scalp electrode FC2. Red dashed vertical lines signal the onset and offset of the 4-pulse stimulation burst; the grey dashed vertical line indicates the visual target onset. The horizontal black dashed line signals the frequency of 30 Hz at which active rhythmic patterns were delivered. On the statistical maps, grey colors indicate statistically significant difference between conditions. Notice that both active rhythmic and active random stimulation increased power at ~30 Hz during stimulation.
