Document Detail

Failure to find luxotonic responses for single units in visual cortex of the rabbit.
MedLine Citation:
PMID:  7379879     Owner:  NLM     Status:  MEDLINE    
The firing frequency of a population of 213 units in striate and circumstriate cortex of the moderately restrained rabbit was studied under the influences of alternating 1-min periods of darkness versus steady, diffuse, featureless illumination. The intent was to determine whether luxotonic responses, so prominent in striate cortex of primates, are indeed absent in rabbits. Such was the case, there being only transient occurrences in three units where the continuing rate of discharge in darkness was double that in the light. There were, however, much more modest differences in rate of continuing discharge in light versus darkness, and for 46% of the units discharging greater than 1/s this difference exceeded 10% and/or 1/s. The rate of discharge in any case did not provide a reliable index as to the characteristics of a unit's receptive field in response to patterned visual stimuli. The nature and function of luxotonic activity in primates still not being understood, it cannot be decided whether its absence in rabbits represents a true qualitative or merely a quantitative difference between species.
P J Kahrilas; R W Doty; J R Bartlett
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Experimental brain research     Volume:  39     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  1980  
Date Detail:
Created Date:  1980-08-25     Completed Date:  1980-08-25     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  11-6     Citation Subset:  IM    
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MeSH Terms
Dark Adaptation
Dominance, Cerebral / physiology
Neural Inhibition
Neurons / physiology
Retina / physiology
Visual Cortex / physiology*
Visual Pathways / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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