[Significance of latency and amplitude values of the visual evoked potential in children with early childhood brain damage].

The latency and amplitude data of optically evoked potentials (unipolar from the vertex) were measured during the 50-200 ms interval in a group of normal boys (n = 26) and a group of boys with brain damage sustained during early childhood (n = 38). The latency periods were sometimes significantly longer and the amplitudes larger (flash stimulus) and smaller (pattern stimulus) respectively in the brain damaged than in the normal subjects. In view of the results of clinical, neurological and psychological examinations, these phenomena must be attributed to delayed maturation of the central nervous functional system.