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