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Titolo:
Spatial scale and cellular substrate of contrast adaptation by retinal ganglion cells
Autore:
Brown, SP; Masland, RH;
Indirizzi:
Harvard Univ, Sch Med, Program Neurosci, Boston, MA 02115 USA Harvard Univ Boston MA USA 02115 , Program Neurosci, Boston, MA 02115 USA Massachusetts Gen Hosp, Howard Hughes Med Inst, Boston, MA 02114 USA Massachusetts Gen Hosp Boston MA USA 02114 Med Inst, Boston, MA 02114 USA
Titolo Testata:
NATURE NEUROSCIENCE
fascicolo: 1, volume: 4, anno: 2001,
pagine: 44 - 51
SICI:
1097-6256(200101)4:1<44:SSACSO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
STARBURST AMACRINE CELLS; RECEPTIVE-FIELD PROPERTIES; MACAQUE MONKEY RETINA; RABBIT RETINA; BIPOLAR CELLS; GAIN-CONTROL; GABA(C) RECEPTORS; PRIMATE RETINA; VISUAL-CORTEX; MORPHOLOGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Masland, RH Harvard Univ, Sch Med, Program Neurosci, Goldenson 228, Boston, MA 02115 USA Harvard Univ Goldenson 228 Boston MA USA 02115 n, MA 02115 USA
Citazione:
S.P. Brown e R.H. Masland, "Spatial scale and cellular substrate of contrast adaptation by retinal ganglion cells", NAT NEUROSC, 4(1), 2001, pp. 44-51

Abstract

Human visual perception and many visual system neurons adapt to the luminance and contrast of the stimulus. Here we describe a form of contrast adaptation that occurs in the retina. This adaptation had a local scale smaller than the dendritic or receptive fields of single ganglion cells and was insensitive to pharmacological manipulation of amacrine cell function. These results implicate the bipolar cell pathway as a site of contrast adaptation. The time required for contrast adaptation varied with stimulus size, ranging from approximately 100 ms for the smallest stimuli, to seconds for stimuli the size of the receptive field. The differing scales and time courses of these effects suggest that:multiple types of contrast adaptation are usedin viewing natural scenes.

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Documento generato il 29/03/20 alle ore 15:27:56