Relationship of specific EEG frequencies at specific brain areas with performance

THIS study shows that incorrect responses are preceded by different EEG cha racteristics than correct responses, and that these differences appear in s pecific brain regions that participate in each particular task. EEGs were r ecorded in children during three different tasks: color discrimination (CDT ), verbal working memory (VWM), and word categorization task (WCT). EEG seg ments previous to the presentation of the stimulus were analysed. Incorrect responses were preceded by lower EEG power values at 7.8 Hz in posterior t emporal and right parietal leads in CDT, 8.59 and 9.36 Hz in frontal areas in VWM, and 10.72 Hz in the left hemisphere in WCT. In the former task > 1. 56 Hz power in frontal areas prior to an incorrect response was also observ ed. NeuroReport 9: 3681-3687 (C) 1998 Lippincott Williams & Wilkins.