SI Group Differences in Frequency and Power During Random Presentation of a Somatosensory Stimulus. (A) Grand Mean TFR of the individual, virtual channel, spatially-filtered single trials for control subjects. In both control subjects and subjects with ADHD the plot was baselined using the average spectral energy observed in the pre-stimulus period (-100 – 0 ms). (B) Grand Mean TFR of the individual, virtual channel, spatially-filtered single trials for subjects with ADHD. (C) Group mean differences of the group TFRs. (D) Statistically significant values remaining once group differences were thresholded to p </= 0.05. (E) Divergence of early response to the stimulus in controls and ADHD. (F) Divergence of power in beta rebound in the latter portion of the trial between controls and ADHD.