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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 72, Iss. 8 — Aug. 1, 1982
  • pp: 1008–1013

Chromatic adaptation and flicker-frequency effects on primate R—G-cone difference signal

William S. Baron  »View Author Affiliations


JOSA, Vol. 72, Issue 8, pp. 1008-1013 (1982)
http://dx.doi.org/10.1364/JOSA.72.001008


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Abstract

I recently reported on a negative component in the foveal local electroretinogram (LERG) of the primate that is dependent on the sensitivity differences between the R and G cones. This R—G-cone difference signal is most readily resolved in the foveal LERG in response to low-frequency sinusoidally flickering stimuli. In this paper, I report on changes in the R—G-cone difference signal (elicited with a 670-nm test stimulus) that are induced by 670- and 470-nm chromatic adaptation and flicker frequency. Both long- and short-wavelength backgrounds reduce the cone difference signal, but the long-wavelength reduction is associated with a phase shift that is absent with short-wavelength adaptation. Following extinction of the long-wavelength background, the R—G-cone difference signal is initially absent and increases in amplitude and phase for 5 min. In contrast, following extinction of a short-wavelength background that is about equally effective on the R cones, the cone difference signal is always present and at f ll amplitude. The R—G-cone difference signal has a low-pass frequency response that falls off at a higher frequency and more abruptly than the accompanying positive component.

© 1982 Optical Society of America

Citation
William S. Baron, "Chromatic adaptation and flicker-frequency effects on primate R—G-cone difference signal," J. Opt. Soc. Am. 72, 1008-1013 (1982)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-72-8-1008

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