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Titolo:
Physiology of L- and M-cone inputs to H1 horizontal cells in the primate retina
Autore:
Dacey, DM; Diller, LC; Verweij, J; Williams, DR;
Indirizzi:
Univ Washington, Dept Biol Struct, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 t Biol Struct, Seattle, WA 98195 USA Univ Washington, Reg Primate Res Ctr, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 imate Res Ctr, Seattle, WA 98195 USA Univ Rochester, Ctr Visual Sci, Rochester, NY 14627 USA Univ Rochester Rochester NY USA 14627 Visual Sci, Rochester, NY 14627 USA
Titolo Testata:
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
fascicolo: 3, volume: 17, anno: 2000,
pagine: 589 - 596
SICI:
1084-7529(200003)17:3<589:POLAMI>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECTRAL SENSITIVITY; FLICKER PHOTOMETRY; MONKEY RETINA; CONNECTIONS; LUMINANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Dacey, DM Univ Washington, Dept Biol Struct, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 uct, Seattle, WA 98195 USA
Citazione:
D.M. Dacey et al., "Physiology of L- and M-cone inputs to H1 horizontal cells in the primate retina", J OPT SOC A, 17(3), 2000, pp. 589-596

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 thatthe 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 inthe mosaic of L and M cones. (C) 2000 Optical Society of America [S0740-3232(00)00403-8].

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Documento generato il 27/09/20 alle ore 12:07:24