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Effets de la stimulation sensorielle somatique sur les champs visuels des neurones de la région genouillée chez le Chat anesthésié au chloralose

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Summary

In dark adapted cat under deep chloralose anaesthesia, a somatic stimulation enlarges the size of the visual field of geniculate neurons, which then even discharge when a light stimulus is applied outside and near to the border of the visual field which has been outlined before without any somatic stimulation; moreover, the discharge rate upon visual stimulation inside the visual field also increases. This was also demonstrated in photopic conditions.

Above the L G N, some units, which could be cells of the Nucleus Reticularis Thalami, exhibit unusual large receptive fields (30°–90°), and their responses appear to be fatigable. In a very few cases, paw stimulation enhances their visual response; but generally, after somatic stimulation, these units become unresponsive to the light stimulus.

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Authors and Affiliations

  1. Laboratoire de Neurophysiologie, Université de Louvain, Belgique

    J. M. Godfraind & M. Meulders

  2. Wellcome Department of Research in Anaesthesia, McGill University, Montreal, Canada

    J. M. Godfraind

Authors
  1. J. M. Godfraind
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  2. M. Meulders
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Godfraind, J.M., Meulders, M. Effets de la stimulation sensorielle somatique sur les champs visuels des neurones de la région genouillée chez le Chat anesthésié au chloralose. Exp Brain Res 9, 183–200 (1969). https://doi.org/10.1007/BF00234454

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  • DOI: https://doi.org/10.1007/BF00234454

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