青年期の事象関連電位 (ERP) の分析

抄録

ERPs to auditory stimuli during an oddball task were recorded from 47 adolescents ranging in age from 14 to 19 years. Relationships between each of the ERP components (N100, P200 and N200 and P300) and age or IQ were examined. No correlationship between the peak-latencies of the components and age could be detected, but the peak-amplitudes of N200 recorded on the Fz showed an age-related change (r=.396). As age increased, N200 amplitude decreased. It was suggested that young adolescents were differed from adults in the detection process of a task-relevant rare stimulus. In regard to IQ, the peak-latency of P300 was longer for the lower IQs than the higher IQs (r=-319 at Cz and r=-465 at Pz) and the peak-amplitude was also smaller (r=.298 at Pz). These correlations suggest that the endogenous brain potential is related to intellectual capacity.