Abstract
In experiments conducted on cats anesthetized with Nembutal, it was shown that a primary response, a delayed negative response, and afterwards, a slow negative potential ariseing. sigmoideus posterior following the application of a single stimulus to the ventroposterolateral nucleus of the thalamus. The generation of these potentials is accompanied by the appearance of three spike-like deflections in the subcortical white matter. These deflections reflect arrivals of afferent impulses to the cortex. It is suggested that the delayed negative wave chiefly reflects the activity of stellate cells, while the slow negative potential mainly reflects the activity of glial cells. It is concluded that the appearances of the three enumerated reactions are connected with the successive arrivals of impulses from the thalamus to the cortex along three different systems of afferent fibers, differing from one another with respect to velocities of impulse conduction and characteristic distributions of endings in the cortex.
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I. S. Beritashvili Institute of Physiology, Academy of Sciences of the Georgian SSR, Tbilisi. Translated from Neirofiziologiya, Vol. 17, No. 4, pp. 435–441, July–August, 1985.
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Ocherashvili, I.V. Slow electrical potentials arising after the primary response in the somatosensory region of the cerebral cortex in the cat as a result of stimulation of the ventroposterolateral nucleus of the thalamus. Neurophysiology 17, 305–310 (1985). https://doi.org/10.1007/BF01052339
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DOI: https://doi.org/10.1007/BF01052339