As illustrated in Fig. 4b, the alcoholic group displayed lower power compared to controls in all frequency bands at all time-points for the Go as well as NoGo conditions (refer to respective TFR plots) at midline frontal location. Further, 2D surface Laplacian head-maps showed that although both groups had evoked theta power localized bilaterally at frontocentral as well as bilateral parietotemporal regions of the brain (similar topography), the alcoholics displayed much lower and region-restricted density compared to the controls for both Go and NoGo conditions.
