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Investigation of evoked potentials to photic stimulation in man after deafferentation of the visual cortex

  • Pathological Physiology and General Pathology
  • Published:
Bulletin of Experimental Biology and Medicine Aims and scope

Abstract

Evoked potentials (EPs) to photic stimulation in the occipital cortex were investigated in 28 patients with homonymous hemianopia caused by a focal lesion of the visual system. Asymmetry of the EPs in the two hemispheres was recorded only in cases of complete homonymous hemianopia. A reduction in the response on the side contralateral to the hemianopia was observed in patients with lesions of the visual pathways at the level of the optic tract and as a result of the spread of the pathological focus to the occipital lobe. In patients with a lesion affecting predominantly the mediobasal zones of the temporal lobe and with homonymous hemianopia caused by a lesion of the optic radiation, responses in half of the cases were higher in amplitude on the side of the focus or were recorded only in the deafferented occipital region.

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Authors
  1. N. S. Galkina
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  2. V. V. Gnezditskii
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  3. A. A. Aleksandrova
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  4. A. I. Kozlova
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Galkina, N.S., Gnezditskii, V.V., Aleksandrova, A.A. et al. Investigation of evoked potentials to photic stimulation in man after deafferentation of the visual cortex. Bull Exp Biol Med 79, 371–374 (1975). https://doi.org/10.1007/BF00832699

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  • DOI: https://doi.org/10.1007/BF00832699

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