As evidenced in Fig. 3a, Go evoked delta power was higher overall than NoGo evoked delta power at all except frontal regions in both groups; evoked power density was found to be highest at the parietal region for the Go condition and highest at the central region for the NoGo condition in both groups. Significantly higher evoked delta power was found for the Go compared to the NoGo condition at all but frontal regions in the control group (Fig. 3a, top left panel), and all except frontal and central regions in alcoholics (Fig. 3a, top right panel). The alcoholic group displayed lower evoked delta power compared to the control group at all regions regardless of the condition. This lower evoked delta power in alcoholics compared to controls was statistically significant for the Go condition at all regions (Fig. 3a, bottom left panel) and for the NoGo condition at all except left temporal regions (Fig. 3a, bottom right panel).
