Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Physiology of L- and M-cone inputs to H1 horizontal cells in the primate retina

Not Accessible

Your library or personal account may give you access

Abstract

In the primate retina, H1 horizontal cells form an electrically coupled network and receive convergent input from long- (L-) and middle- (M-) wavelength-sensitive cones. Using an in vitro preparation of the intact retina to record the light-evoked voltage responses of H1 cells, we systematically varied the L- and M-cone stimulus contrast and measured the relative L- and M-cone input strength for 137 cells across 33 retinas from three Old World species (Macaca nemestrina, M. fascicularis, and Papio anubis). We found that the L- and the M-cone inputs were summed by the H1 cell in proportion to the stimulus cone contrast, which yielded a measure of what we term L- and M-cone contrast gain. The proportion of L-cone contrast gain was highly variable, ranging from 25% to 90% [mean ± standard deviation, (60±14)%]. This variability was accounted for by retinal location within an individual, with the temporal retina showing a consistently higher percentage of L-cone gain, and by large overall variation across individuals, with the mean percentage of L-cone gain ranging from 32% to 80%. We hypothesize that the relative L- and M-cone contrast gain is determined simply by the relative number of L and M cones in the H1 cell’s receptive field and that the variability in L- and M-cone contrast gain reflects a corresponding variability in the mosaic of L and M cones.

© 2000 Optical Society of America

Full Article  |  PDF Article
More Like This
Interindividual and topographical variation of L:M cone ratios in monkey retinas

Samir S. Deeb, Lisa C. Diller, David R. Williams, and Dennis M. Dacey
J. Opt. Soc. Am. A 17(3) 538-544 (2000)

Comparison of red–green equiluminance points in humans and macaques: evidence for different L:M cone ratios between species

Karen R. Dobkins, Alex Thiele, and Thomas D. Albright
J. Opt. Soc. Am. A 17(3) 545-556 (2000)

L/M cone ratios in human trichromats assessed by psychophysics, electroretinography, and retinal densitometry

Jan Kremers, Hendrik P. N. Scholl, Holger Knau, Tos T. J. M. Berendschot, Tomoaki Usui, and Lindsay T. Sharpe
J. Opt. Soc. Am. A 17(3) 517-526 (2000)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved