Figure 4.
Time course of mean low-frequency (5–12 Hz; black line) and mean β (13–30 Hz; gray line) power after the end of HFS expressed as a percentage change from baseline activity (100–140 s after HFS). Time-evolving p value (Student's t test) revealed a significant suppression of β activity for 12 s after the end of HFS compared with baseline (significant time period is indicated by horizontal black line). Note that power suppression after HFS is frequency specific, and no significant change occurred in the 5–12 Hz band.