Abstract
Changes in visual evoked potentials were studied in rats at different stages of formation of experimental photogenic epilepsy induced by injection of tetanus toxin into the lateral geniculate body. The greatest change in evoked potentials in the lateral geniculate body consisted of the appearance of an aditional component in the series of waves of the primary response. Meanwhile in the ipsilateral visual cortex the amplitude of the first negative component of the evoked potential was considerably increased. Correlation was found between the changes in the amplitude of this component in the visual cortex and the change in steepness of the additional component of the evoked potential in the geniculate body, reflecting functional reorganization of that nucleus. The results are evidence of significant disturbances of the relay function of the lateral geniculate body when a generator of pathologically enhanced excitation is formed in it.
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