[Visual projections into the telencephalon and diencephalon of the teleost fish Serranus scriba (electrophysiologic study)].

In acute experiments on Serranus scriba, two discrete foci of visual activity in the telencephalon were shown--in the dorsal pallium and in the central telencephalic area. The latency of focal potentials evoked by optic tectum stimulation was at least 2 msec shorter than that of the responses elicited by optic nerve stimulation. In the region of nucleus rotundus and some other thalamo-pretectal structures, focal potentials and single unit reactions to both types of stimulation were registered. Responses to optic tectum stimulation in nucleus pretectalis exhibited the shortest latency. It is suggested that visual impulses to the central telencephalic area are relayed consequently in the optic tectum and probably in more than one thalamo-pretectal nucleus.