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Audiovisual interaction and its correlation with cortical stimulation in the lateral thalamus

1965; Elsevier BV; Volume: 12; Issue: 2 Linguagem: Inglês

10.1016/0014-4886(65)90087-7

1090-2430

T. Hotta, Shin‐Ichi Terashima,

Olfactory and Sensory Function Studies

Single-unit recordings from the anterolateral region of the thalamus (especially n. reticularis thalami) were obtained in cats anesthetized by chloralose and given Flaxedil. When sound and light stimuli were applied, audiovisual interaction was observed in a mutual blocking or facilitatory pattern in which increased probability of occurrence of discharge, decreased latency of the initial spike discharge, or increased number of spikes per discharge were demonstrated. Furthermore, thalamic units in which the audiovisual interaction was found responded to electric shock applied to the visual or auditory cortex and showed the occlusion between visual and cortical induced responses at appropriate stimulus intervals. The facilitatory effect of sound stimulation on the visual response may be due to synaptically induced depolarization from the auditory afferent pathway. The corticofugal influence from the visual cortex on the thalamic reticular neuron is assumed.