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Color-discrimination tests on fibers in ground squirrel optic nerve

Color-discrimination tests on fibers in ground squirrel optic nerve in U.S.A. GERALD Department H. BARBARA University of California, R. B. H. California 93106 of Psychology, Santa Barbara, SUMMARY CCLUSIS ground squirrel (Spermophilus beecheyi) has dichromatic color visi. To determine which units in the of this species transmit the informati needed to support color visi, two were run single units recorded from anesthetized squirrels. Both of these had previously been run in behavioral experiments. e was a neutral-point test in which the respses of single units to a series of equiluminant achromatic chromatic lights were obtained, the object being to determine which achromatic chromatic lights yielded equivalent respses which did not. A secd test was discriminati, which involved a determinati of the abilities of single fibers to discriminate (by changes in their firing rates) between various pairs of equiluminant mochromatic lights. 2. Five classes of units can be distinguished in the of this ground squirrel. Three of these give spectrally noppent respses (directi-selective, ctrast-sensitive, BG/G units). The ctrast-sensitive directi-selective units did not show differential respses to equiluminant mochromatic achromatic stimuli; they csequently transmit no informati that could be used in the defining of color visi. The BG/G units, which comprise about 6% of all -tract fibers in this http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

Color-discrimination tests on fibers in ground squirrel optic nerve

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Publisher
The American Physiological Society
Copyright
Copyright © 1981 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
Publisher site
See Article on Publisher Site

Abstract

in U.S.A. GERALD Department H. BARBARA University of California, R. B. H. California 93106 of Psychology, Santa Barbara, SUMMARY CCLUSIS ground squirrel (Spermophilus beecheyi) has dichromatic color visi. To determine which units in the of this species transmit the informati needed to support color visi, two were run single units recorded from anesthetized squirrels. Both of these had previously been run in behavioral experiments. e was a neutral-point test in which the respses of single units to a series of equiluminant achromatic chromatic lights were obtained, the object being to determine which achromatic chromatic lights yielded equivalent respses which did not. A secd test was discriminati, which involved a determinati of the abilities of single fibers to discriminate (by changes in their firing rates) between various pairs of equiluminant mochromatic lights. 2. Five classes of units can be distinguished in the of this ground squirrel. Three of these give spectrally noppent respses (directi-selective, ctrast-sensitive, BG/G units). The ctrast-sensitive directi-selective units did not show differential respses to equiluminant mochromatic achromatic stimuli; they csequently transmit no informati that could be used in the defining of color visi. The BG/G units, which comprise about 6% of all -tract fibers in this

Journal

Journal of NeurophysiologyThe American Physiological Society

Published: May 1, 1981

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