Effects for no-go events within the (A) ADHD group and (B) TD controls. Transparent brain maps showing regions where the time courses were significant covariates of fMRI signal changes for no-go trials. These results are based on a random effects analysis of 25 subjects per group using an uncorrected threshold p = .001 and a cluster size threshold of 72 (equivalent to a corrected threshold p = .05). Neurologic convention is used (i.e., right = right hemisphere; projections looking rightward or into the page). For both groups, main effects of no-go are visible in the rostral supplementary motor area (“pre-SMA,” BA 6). In the TD group, additional effects are seen in the bilateral occipital lobes, right middle frontal gyrus, superior temporal gyrus, cerebellar culmen, and putamen.