Abstract

Long-term effects of total visual deafferentation on the functional organization of the visual cortex were studied in freely behaving adult cats. Single unit activity in control records was compared with findings immediately after bilateral enucleation and after one month. Neuronal activity one month after enucleation was intermediate between control records and those immediately after enucleation, as revealed in the pattern and rate in maintained unit activity, unit responsiveness to geniculate stimulation, and in firing correlates of ponto-geniculo-occipital waves. The results suggest restoration of some basic cortical organizations in terms of neural excitability changes in shifting states of vigilance.

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