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Response properties of horizontal cells and photoreceptor cells in the retina of the tree squirrel, Sciurus carolinensis

Response properties of horizontal cells and photoreceptor cells in the retina of the tree... Abstract A new experimental preparation for intracellular recording from mammalian retinal neurons has been established. This is the arterially perfused eyecup preparation of the tree squirrel, Sciurus carolinensis. Two horizontal cell types have been recorded in this preparation. These cell types differ in their response waveforms. Type 1 horizontal cells appear to receive input only from cones, whereas type 2 horizontal cells receive mixed rod-cone input. Sciurus horizontal cells have receptive-field sizes smaller than those of horizontal cells in other mammalian and nonmammalian species. Recordings from a second class of cells in the outer retina of the squirrel reveal receptive-field properties considerably different from those of squirrel horizontal cells and similar to those of photoreceptor cells in other species. On the basis of these receptive-field properties, recording depth, and spectral response characteristics, we conclude that these recordings were from cone-photoreceptor cells. These recordings from squirrel cones are the first demonstration of mammalian photoreceptor response amplitudes and receptive-field interactions comparable with those demonstrated for nonmammalian species. Copyright © 1985 the American Physiological Society http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

Response properties of horizontal cells and photoreceptor cells in the retina of the tree squirrel, Sciurus carolinensis

Leeper, H. F.; Charlton, J. S.
Journal of Neurophysiology , Volume 54 (5): 1157 – Nov 1, 1985
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Publisher
The American Physiological Society
Copyright
Copyright © 1985 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
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Abstract

Abstract A new experimental preparation for intracellular recording from mammalian retinal neurons has been established. This is the arterially perfused eyecup preparation of the tree squirrel, Sciurus carolinensis. Two horizontal cell types have been recorded in this preparation. These cell types differ in their response waveforms. Type 1 horizontal cells appear to receive input only from cones, whereas type 2 horizontal cells receive mixed rod-cone input. Sciurus horizontal cells have receptive-field sizes smaller than those of horizontal cells in other mammalian and nonmammalian species. Recordings from a second class of cells in the outer retina of the squirrel reveal receptive-field properties considerably different from those of squirrel horizontal cells and similar to those of photoreceptor cells in other species. On the basis of these receptive-field properties, recording depth, and spectral response characteristics, we conclude that these recordings were from cone-photoreceptor cells. These recordings from squirrel cones are the first demonstration of mammalian photoreceptor response amplitudes and receptive-field interactions comparable with those demonstrated for nonmammalian species. Copyright © 1985 the American Physiological Society

Journal

Journal of Neurophysiology – The American Physiological Society

Published: Nov 1, 1985

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