Clinical and Anatomical Evidence for Parallel Processing in the Human Visual System

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Identifier 19850306_nanos_visualsystemsympos_01
Title Clinical and Anatomical Evidence for Parallel Processing in the Human Visual System
Creator Alfredo A. Sadun; Steven E. Feldon
Affiliation (AAS) Flora L. Thornton Chair, Professor of Ophthalmology and Neurological Surgery, Keck School of Medicine at USC
Subject Human Retinal Ganglion Cell; Lateral Geniculate; Pretectum; Hypothalamus; Superior Colliculus; Pulvinar; Human Visual System
Description Classes of retinal ganglion cells have been morphologically and physiologically described in several experimental animals. Whereas no such classification of retinal ganglion cell types has been made in man, there have been psychophysical and retinal electrophysiological human studies suggestive of a similar segregation of retinal ganglion cells into classes which subserve different functions. The neuro-ophthalmic clinician often has psychophysical evidence of the separation of visual functions. For example, it is well known that a patient with optic neuritis may have a pronounced afferent pupillary defect despite having normal visual acuity. Moreover, such a patient may measure best for Snellen visual acuities when the contrast is neither too high nor too low. Indeed, we offer evidence that brightness-sense is a sensitive measure of optic nerve disease which may be singularly impaired. Thus we see that several diseases of the optic nerve produce impairments of function which are out of proportion to other defects of ViSiOn. This mismatch between certain parameters of function by ophthalmic diseases has major clinical and scientific implications.
Date 1985-03-06
Language eng
Format application/pdf
Type Text
Source 1985 North American Neuro-Ophthalmology Society Annual Meeting
Relation is Part of NANOS 1985: Visual System Symposium
Collection Neuro-Ophthalmology Virtual Education Library: NANOS Annual Meeting Collection: https://novel.utah.edu/collection/nanos-annual-meeting-collection/
Publisher North American Neuro-Ophthalmology Society
Holding Institution Spencer S. Eccles Health Sciences Library, University of Utah
Rights Management Copyright 1985. For further information regarding the rights to this collection, please visit: https://NOVEL.utah.edu/about/copyright
ARK ark:/87278/s6sn3gp3
Setname ehsl_novel_nam
ID 183591
Reference URL https://collections.lib.utah.edu/ark:/87278/s6sn3gp3
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