[Laminar distribution of current sources in the superior colliculi of the rabbit upon stimulation of the optic nerve].

The evoked potential field in the rabbit superior colliculus was subjected to the current source density analysis to determine the location and sequence of the current sinks and sources after electrical stimulation of the optic nerve. The earliest current sink was observed in the middle part of the stratum griseum superficiale. The later and the most prominent current sinks were observed in the upper part and in the deep part of the stratum griseum superficiale. The time course of the current sinks and sources was in correspondence with the main components of the evoked potential. The results permit indicating the location of afferent synapses and sequence of their activation.