A reweighting of receptor mechanisms in the ground squirrel retina: PIII and B-wave spectral sensitivity functions

Jack Raisanen; Stevan M. Dawis

doi:10.1016/0006-8993(83)90605-4

A reweighting of receptor mechanisms in the ground squirrel retina: PIII and B-wave spectral sensitivity functions

Jack Raisanen, Stevan M. Dawis

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

PIII and b-wave spectral sensitivity functions were measured under various adapted conditions in the 13-lined ground squirrel. The PIII was isolated by intravitreal injection of sodium l-aspartate. Under the conditions studied, the PIII spectral sensitivity function always fitted the absorption spectrum of a 518 ± 3 nm Dartnall nomogram. This suggests that of the three photoreceptors ('rod-like', 'blue' cone and 'green' cone) present in the 13-lined ground squirrel the green cones are the overwhelming majority. The dark-adapted b-wave had two components: a b₁-wave with a spectral sensitivity that fitted a 516 ± nm Dartnall nomogram and a b₂-wave with a spectral sensitivity that fitted a 502 ± 4 nm Dartnall nomogram. The light-adapted b-wave had a spectral sensitivity that fitted a 516 ± 2 nm Dartnall nomogram.

Original language	English (US)
Pages (from-to)	311-318
Number of pages	8
Journal	Brain Research
Volume	270
Issue number	2
DOIs	https://doi.org/10.1016/0006-8993(83)90605-4
State	Published - Jul 4 1983

ASJC Scopus subject areas

General Neuroscience
Molecular Biology
Clinical Neurology
Developmental Biology

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@article{896bb05e5385469d8126c13e0a14d950,

title = "A reweighting of receptor mechanisms in the ground squirrel retina: PIII and B-wave spectral sensitivity functions",

abstract = "PIII and b-wave spectral sensitivity functions were measured under various adapted conditions in the 13-lined ground squirrel. The PIII was isolated by intravitreal injection of sodium l-aspartate. Under the conditions studied, the PIII spectral sensitivity function always fitted the absorption spectrum of a 518 ± 3 nm Dartnall nomogram. This suggests that of the three photoreceptors ('rod-like', 'blue' cone and 'green' cone) present in the 13-lined ground squirrel the green cones are the overwhelming majority. The dark-adapted b-wave had two components: a b1-wave with a spectral sensitivity that fitted a 516 ± nm Dartnall nomogram and a b2-wave with a spectral sensitivity that fitted a 502 ± 4 nm Dartnall nomogram. The light-adapted b-wave had a spectral sensitivity that fitted a 516 ± 2 nm Dartnall nomogram.",

author = "Jack Raisanen and Dawis, {Stevan M.}",

note = "Funding Information: The authors thank Dr. Richard L. Purple for the help that he has given to us. We are grateful to Drs. Charles Knox, John Soechting, and John Anderson for supplying various computer programs. We thank Joanne Losinski for typing the manuscript. This work was supported in part by U.S. Public Health Service Grant EY 00293. Computer facilities were made available by Grants AF-AFOSR(AFSC)-1221, AFOSR 71-1969, and AFOSR 75-2804.",

year = "1983",

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doi = "10.1016/0006-8993(83)90605-4",

language = "English (US)",

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pages = "311--318",

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T2 - PIII and B-wave spectral sensitivity functions

AU - Raisanen, Jack

AU - Dawis, Stevan M.

N1 - Funding Information: The authors thank Dr. Richard L. Purple for the help that he has given to us. We are grateful to Drs. Charles Knox, John Soechting, and John Anderson for supplying various computer programs. We thank Joanne Losinski for typing the manuscript. This work was supported in part by U.S. Public Health Service Grant EY 00293. Computer facilities were made available by Grants AF-AFOSR(AFSC)-1221, AFOSR 71-1969, and AFOSR 75-2804.

PY - 1983/7/4

Y1 - 1983/7/4

N2 - PIII and b-wave spectral sensitivity functions were measured under various adapted conditions in the 13-lined ground squirrel. The PIII was isolated by intravitreal injection of sodium l-aspartate. Under the conditions studied, the PIII spectral sensitivity function always fitted the absorption spectrum of a 518 ± 3 nm Dartnall nomogram. This suggests that of the three photoreceptors ('rod-like', 'blue' cone and 'green' cone) present in the 13-lined ground squirrel the green cones are the overwhelming majority. The dark-adapted b-wave had two components: a b1-wave with a spectral sensitivity that fitted a 516 ± nm Dartnall nomogram and a b2-wave with a spectral sensitivity that fitted a 502 ± 4 nm Dartnall nomogram. The light-adapted b-wave had a spectral sensitivity that fitted a 516 ± 2 nm Dartnall nomogram.

AB - PIII and b-wave spectral sensitivity functions were measured under various adapted conditions in the 13-lined ground squirrel. The PIII was isolated by intravitreal injection of sodium l-aspartate. Under the conditions studied, the PIII spectral sensitivity function always fitted the absorption spectrum of a 518 ± 3 nm Dartnall nomogram. This suggests that of the three photoreceptors ('rod-like', 'blue' cone and 'green' cone) present in the 13-lined ground squirrel the green cones are the overwhelming majority. The dark-adapted b-wave had two components: a b1-wave with a spectral sensitivity that fitted a 516 ± nm Dartnall nomogram and a b2-wave with a spectral sensitivity that fitted a 502 ± 4 nm Dartnall nomogram. The light-adapted b-wave had a spectral sensitivity that fitted a 516 ± 2 nm Dartnall nomogram.

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A reweighting of receptor mechanisms in the ground squirrel retina: PIII and B-wave spectral sensitivity functions

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