Regional relationship of visual evoked potentials in infants and school-aged children.

VEPs were recorded from the inion, O1, O2, Pz, C3 and C4 in 74 normal children, aged 1--13 years. These VEPs were compared at the various scalp areas using a correlational technique. Wave forms of VEPs were different for different scalp areas; in particular, a sharp distinction was seen in the positive component having a peak latency of about 100 msec. The component was occipital-dominant, showing a maximum amplitude at the inion. Correlations of VEPs from the right and left hemispheres of the central area were high for all ages, while those of the right and left hemispheres of the occipital area were generally lower and showed greater inter-individual variability than in the central area. Correlations between VEPs from the occipital and non-occipital areas (i.e., inion-Pz, inion-C4, O1-C3 and O2-C4), with the exception of inion-Pz, were significantly greater with increasing age.