VISUAL-EVOKED POTENTIALS AND FUNCTIONAL A SYMMETRY IN CHILDREN WITH INTELLECTUAL DEFICIENCY OF A DIFFERENT DEGREE

Visual evoked potentials (VEP) to flash and patterned visual stimuli h ave been recorded from occipital and central brain regions in 7-8-year -old boys with normal intellect (20 cases), with mental retardation (1 5 cases) and with oligophrenia of a debile degree (27 cases). A signif icant elongation of late-component latency has been revealed in motor brain areas VEP in oligophrenia group compared to normal subjects. A n egative correlation between P190 component latency of motor area VEP t o patterned visual stimulus and general and nonverbal intellectual ind ices has been stated in full right-handed subjects with intellectual d eficiency. Such a relation was absent in right-handed patients with le ft dominant eye.