[Disruption of the functional interrelationships between specific and nonspecific brain systems in mild...

An examination of the topographic distribution of evoked visual potential over the scalp after a brain concussion revealed a pronounced disturbance of the regular changes of the amplitude-temporal characteristics of nonspecific components in most patients. A diminution or an increase of the amplitude of the N2 component in the specific projection zone and an increase of the amplitude of the N3 component in the non-specific zone were noted, and so was an increase of the latent period of the P3N3 and P4N4 components in all deflections. The changes revealed point to a disturbance of the functional relations between the specific and nonspecific systems of the brain as a result of craniocerebral injury.