Abstract
The effect of excitation of the contralateral nuclei of the cerebellum on the activity of anti-dromically-identified fast and slow pyramidal neurons in the sensorimotor region (SMR) of the cerebral cortex was investigated in delicate experiments on unnarcotized cats immobilized with procurane. It was found that excitation of the above nuclei could evoke peak responses in the neurons of the pyramidal tract (PT), but more often it modified their background activity. These responses were more pronounced on excitation of the intermediate nucleus (IN) or the dentate nucleus (DN), although they also often arose on excitation of the fastigial nucleus (FN). Qualitatively different effects (stimulative and inhibitory) were observed in some neurons on excitation of different nuclei in the cerebellum. It was found that the nature of the responses by fast neurons in the PT to excitation of the central nuclei in the cerebellum did not differe substantially from the nature of the responses by slow neurons, but that the responses of the latter arose with a longer latent period, and in most cases were less pronounced.
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Additional information
L. A. Orbeli Institute of Physiology, Academy of Sciences of the Armenian SSR, Erevan. Translated from Neirofiziologiya, Vol. 3, No. 1, pp. 22–31, January–February, 1971.
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Pogosyan, R.I., Grigoryan, V.G. & Fanardzhyan, V.V. Effects of excitation of the central nuclei of the cerebellum on the activity of neurons in the pyramidal tract. Neurophysiology 3, 16–23 (1971). https://doi.org/10.1007/BF01065586
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DOI: https://doi.org/10.1007/BF01065586