Fig. 1

Topographical maps of the P1 component based on the full set of 128 individual channels for the NoGo condition in ADHD patients and in control subjects. The scalp maps were generated on the basis of the average voltage values in the time-window of the P1 component. Clusters of at least five adjacent scalp derivations with significant group difference in the same direction were defined as electrode clusters, depicted here. Black-and-white coding represents the amplitude value in microvolts, with darker colours corresponding to higher amplitudes. False discovery rate (FDR)-corrected map of Type-I error-probabilities for the group-difference of raw amplitude values Control-ADHD (μV) where darker shades represent larger group differences