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Titolo:
THE LATERAL SPREAD OF LIGHT ADAPTATION IN CAT HORIZONTAL CELL RESPONSES
Autore:
LANKHEET MJM; PRZYBYSZEWSKI AW; VANDEGRIND WA;
Indirizzi:
UNIV ROCHESTER,CTR VISUAL SCI,274 MELIORA HALL ROCHESTER NY 14627 UNIV UTRECHT,DEPT COMPARAT PHYSIOL,UTRECHT BIOPHYS RES INST 3584 CH UTRECHT NETHERLANDS
Titolo Testata:
Vision research
fascicolo: 9, volume: 33, anno: 1993,
pagine: 1173 - 1184
SICI:
0042-6989(1993)33:9<1173:TLSOLA>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
RETINAL GANGLION-CELLS; FREQUENCY TRANSFER PROPERTIES; INDUCED FLICKER ENHANCEMENT; MONKEY MACACA-FASCICULARIS; TURTLE RETINA; BACKGROUND ILLUMINATION; SPATIAL PROPERTIES; SPECTRAL SENSITIVITY; VISUAL-ADAPTATION; VERTEBRATE RETINA;
Keywords:
LIGHT ADAPTATION; HORIZONTAL CELL; RETINA; CAT; LATERAL SPREAD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
76
Recensione:
Indirizzi per estratti:
Citazione:
M.J.M. Lankheet et al., "THE LATERAL SPREAD OF LIGHT ADAPTATION IN CAT HORIZONTAL CELL RESPONSES", Vision research, 33(9), 1993, pp. 1173-1184

Abstract

To investigate the sites of light adaptation processes in the mammalian distal retina, we studied the lateral spread of adaptation signals in cone-driven cat horizontal (H-) cell responses. The size of the adaptation pool is compared to the receptive field for H-cell responses. H-cell activity was recorded intracellularly in the optically intact, in vivo eye. It is demonstrated that light adaptation as measured in H-cells is not a strictly local process. Background light falling outside a central test region effectively modulates the responses to a small test light, flashed on the receptive field center. The integration area for adaptation signals was quantitatively compared to the H-cell receptive field size by measuring the desensitizing effect of background light on the responses to a small centered test spot, as a function of background spot size. The area-adaptation function is comparable tothe area-response function but has a slightly smaller length constant. Light adaptation in H-cell responses, therefore, reveals spread of adaptation over a large distance and is probably mediated through lateral interactions in the H-cell network rather than in the cones.

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Documento generato il 03/12/20 alle ore 12:17:54