The paper reports the results of recordings and maps of event-related potentials (ERPs) obtained in normal subjects. ERPs were recorded from 19 scalp electrode derivations using both visual and acoustic paradigms. In normal subjects, topographical distribution of all ERP components is described in detail. Our findings in normals suggest that the early modulation of stimulus-related potentials could be located in primary associative areas, and that N2, P3a, P3b, and SW have different distributions.