As evidenced in Fig. 6a, NoGo evoked fast alpha displayed an overall higher power than Go at all regions, where power density was found to be highest at the occipital region for both groups and conditions. However, only the control group showed significantly higher NoGo evoked fast alpha power compared to the Go condition at parietal, occipital, and right temporal regions (Fig. 6a, top left panel), whereas the alcoholic group did not display condition differences at any of the six regions (Fig. 6a, top right panel). The alcoholic group displayed lower evoked fast alpha power compared to the control group at all regions regardless of the task condition. However, this lower evoked fast alpha power in alcoholics was significant for only the NoGo condition at parietal, occipital, left-temporal, and right-temporal regions (Fig. 6a, bottom right panel), and not for the Go condition at any of the six regions (Fig. 5a, bottom left panel).
