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 journalArticlepeer-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 languageEnglish (US)
Pages (from-to)311-318
Number of pages8
JournalBrain Research
Volume270
Issue number2
DOIs
StatePublished - Jul 4 1983

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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