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Preferential ipsilateral influence of the posterior hypothalamus on the neocortex

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Abstract

On the 10th–20th day after precollicular transection of the brain stem weak low-frequency electrical stimulation of the posterior hypothalamus preferentially activates the ipsilateral neocortex. After unilateral injury to the posterior hypothalamus, synchronous activity predominates in the ipsilateral neocortex. In premesencephalic animals weak single electrical stimulation of the posterior hypothalamus evokes the appearance of spindles in ipsilateral zones of the frontal cortex, whereas stronger single stimulation causes the diffuse generation of spindles in various parts of the neocortex. Besides this preferential unilateral effect, the influence of the posterior hypothalamus is found to be more strongly expressed in the frontal than in the occipital cortex. It is postulated that the posterior hypothalamus exerts its influence on the neocortex through the thalamic nuclei.

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Authors
  1. T. L. Naeishvili
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  2. A. N. Bakuradze
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  3. A. G. Noselidze
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Additional information

Institute of Physiology, Academy of Sciences of the Georgian SSR, Tbilisi. Translated from Neirofiziologiya, Vol. 8, No. 2, pp. 139–145, March–April, 1976.

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Naeishvili, T.L., Bakuradze, A.N. & Noselidze, A.G. Preferential ipsilateral influence of the posterior hypothalamus on the neocortex. Neurophysiology 8, 117–122 (1976). https://doi.org/10.1007/BF01297745

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  • DOI: https://doi.org/10.1007/BF01297745

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