Abstract
In turtles (Emys orbicularls) immobilized with diplacin, unit responses to electrical stimulation of the optic nerve and olfactory bulb were recorded intracellularly. Earlier observations on the distribution of olfactory projections in cortical structures were confirmed; visual afferent impulses were spread more widely in the turtle cortex than had previously been shown. Visual afferent impulses probably reach the hippocampus via the general cortex along intracortical pathways. These are formed mainly by inhibitory afferent fibers. The response latency of hippocampal cortical neurons to stimulation of the olfactory bulb was clearly dependent on the depth of recording.
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