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Titolo:
The spatial transformation of color in the primary visual cortex of the macaque monkey
Autore:
Johnson, EN; Hawken, MJ; Shapley, R;
Indirizzi:
NYU, Ctr Neural Sci, New York, NY 10003 USA NYU New York NY USA 10003NYU, Ctr Neural Sci, New York, NY 10003 USA
Titolo Testata:
NATURE NEUROSCIENCE
fascicolo: 4, volume: 4, anno: 2001,
pagine: 409 - 416
SICI:
1097-6256(200104)4:4<409:TSTOCI>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRIATE CORTEX; CONTRAST SENSITIVITY; RECEPTIVE-FIELDS; CELLS; NEURONS; ORGANIZATION; MECHANISMS; LUMINANCE; V1; ORIENTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Johnson, EN NYU, Ctr Neural Sci, 4 Washington Pl, New York, NY 10003 USA NYU 4 Washington Pl New York NY USA 10003 w York, NY 10003 USA
Citazione:
E.N. Johnson et al., "The spatial transformation of color in the primary visual cortex of the macaque monkey", NAT NEUROSC, 4(4), 2001, pp. 409-416

Abstract

Perceptually, color is used to discriminate objects by hue and to identifycolor boundaries. The primate retina and the lateral geniculate nucleus (LGN) have cell populations sensitive to color modulation, but the role of the primary visual cortex (V1) in color signal processing is uncertain. We reevaluated color processing in V1 by studying single-neuron responses to luminance and to equiluminant color patterns equated for cone contrast. Many neurons respond robustly to both equiluminant color and luminance modulation(color-luminance cells). Also, there are neurons that prefer luminance (luminance cells), and a few neurons that prefer color (color cells). Surprisingly, most color-luminance cells are spatial-frequency tuned, with approximately equal selectivity for chromatic and achromatic patterns. Therefore, V1 retains the color sensitivity provided by the LGN, and adds spatial selectivity for color boundaries.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 09:42:52