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Titolo:
Estimating receptive field size from fMRI data in human striate and extrastriate visual cortex
Autore:
Smith, AT; Singh, KD; Williams, AL; Greenlee, MW;
Indirizzi:
Univ London, Royal Holloway & Bedford New Coll, Dept Psychol, Egham TW20 0EX, Surrey, England Univ London Egham Surrey England TW20 0EX Egham TW20 0EX, Surrey, England Univ Freiburg, Neurol Klin, D-79106 Freiburg, Germany Univ Freiburg Freiburg Germany D-79106 l Klin, D-79106 Freiburg, Germany
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 12, volume: 11, anno: 2001,
pagine: 1182 - 1190
SICI:
1047-3211(200112)11:12<1182:ERFSFF>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
MACAQUE MONKEY; RHESUS-MONKEY; VISUOTOPIC ORGANIZATION; MAGNIFICATION FACTOR; FUNCTIONAL-ANALYSIS; AREA V3A; NEURONS; VISUALIZATION; SUPPRESSION; UNIFORMITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Smith, AT Univ London, Royal Holloway & Bedford New Coll, Dept Psychol, Egham TW20 0EX, Surrey, England Univ London Egham Surrey England TW20 0EX 0EX, Surrey, England
Citazione:
A.T. Smith et al., "Estimating receptive field size from fMRI data in human striate and extrastriate visual cortex", CEREB CORT, 11(12), 2001, pp. 1182-1190

Abstract

Functional magnetic resonance imaging (fMRI) was used to estimate the average receptive field sizes of neurons in each of several striate and extrastriate visual areas of the human cerebral cortex. The boundaries of the visual areas were determined by retinotopic mapping procedures and were visualized on flattened representations of the occipital cortex. Estimates of receptive field size were derived from the temporal duration of the functional activation at each cortical location as a visual stimulus passed through the receptive fields represented at that location. Receptive fields are smallest in the primary visual cortex (V1). They are larger in V2, larger again in V3/VP and largest of all in areas V3A and V4. In all these areas, receptive fields increase in size with increasing stimulus eccentricity. The results are qualitatively in line with those obtained by others in macaque monkeys using neurophysiological methods.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/01/20 alle ore 21:13:25