Transfer of visual information after unilateral input to the brain

Abstract

Discusses the physiological bases of the method of lateralized visual presentations, a technique used to infer hemispheric asymmetries in normal humans. Evidence on the cortical representation of the visual field in primates and cats is reviewed. Representation of the ipsilateral visual hemifield and the neural mechanisms responsible for it are discussed. The author then presents the available evidence on the sites of callosal transfer of visual information and the nature of such information. It is concluded that visual callosal connections are more numerous and widespread in the association areas than in the primary visual cortex and adjoining visual areas. Thus, the amount of "wrong" ipsilateral visual field that is represented in the various cortical areas of primates and cats increases as one goes from primary visual cortex to extraoccipital areas. It is argued that transfer of unilaterally presented visual stimuli occurs mainly at the temporal and parietal cortical level. (46 ref) (PsycLIT Database Copyright 1987 American Psychological Assn, all rights reserved

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This paper was published in Catalogo dei prodotti della ricerca.

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