Abstract
Publisher Summary This chapter shows that under certain conditions labyrinthine nystagmus to left or right has a different influence on the afterdischarge following unilateral electrical stimulation of the dorsal hippocampus. The observations mentioned suggest the possibility that labyrinthine stimulation may also exert an asymmetric influence on other responses induced by unilateral stimulation of a cerebral structure. These observations, together with the identical effect of clockwise and counterclockwise rotation on the discharges of the resting hippocampus suggest that each vestibular pathway has connections to both hippocampi, forming both excitatory and inhibitory synapses. However, the quantitative distribution of the two types of synapses to either side appears to be unequal. In addition, the effect of vestibular impulses, arriving at the hippocampus, also depends on the state of activity of the latter structure. Electrical excitation of the hippocampus produces a well-organized pattern of discharges.
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