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Abstract
Changes in spontaneous brain electrical activity were studied in experiments on rabbits totally blinded by enucleation befor acquiring vision, and on rabbits with direct vision excluded. Total exclusion of vision causes a sharp decrease in amplitude of electrical potentials in the cortex and subcortex. Depression of activity is greatest in the visual cortex and adjacent regions. Deprivation of direct vision also leads to definite changes in the EEG. The most marked changes are produced by restoration of normal vision. The possible mechanisms of the manifestation of depression in the brain electrical activity of animals with blocked visual function are discussed.
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