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Titolo:
Two-dimensional substructure of MT receptive fields
Autore:
Livingstone, MS; Pack, CC; Born, RT;
Indirizzi:
Harvard Univ, Sch Med, Dept Neurobiol, Boston, MA 02115 USA Harvard Univ Boston MA USA 02115 ed, Dept Neurobiol, Boston, MA 02115 USA
Titolo Testata:
NEURON
fascicolo: 3, volume: 30, anno: 2001,
pagine: 781 - 793
SICI:
0896-6273(200106)30:3<781:TSOMRF>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL AREA MT; MOTION PERCEPTION; STRIATE CORTEX; RESPONSE PROPERTIES; SPATIAL SUMMATION; APPARENT MOTION; COMPLEX CELLS; SHORT-RANGE; MACAQUE; NEURONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Livingstone, MS Harvard Univ, Sch Med, Dept Neurobiol, 220 Longwood Ave, Boston, MA 02115 USA Harvard Univ 220 Longwood Ave Boston MA USA 02115 2115 USA
Citazione:
M.S. Livingstone et al., "Two-dimensional substructure of MT receptive fields", NEURON, 30(3), 2001, pp. 781-793

Abstract

Neurons at progressively higher levels of the visual system have progressively larger, more complicated receptive fields, presumably constructed fromsimpler antecedent receptive fields. To study this hierarchical organization, we used sparse white noise to map receptive-field substructure (second order Wiener-like kernels) in an extrastriate motion processing area (MT) of alert monkeys. The maps revealed a clear substructure, on a spatial scalecomparable to the receptive fields of the V1 inputs. There were both facilitatory and suppressive interactions that differed in spatial organization and time course. Directional interactions were remarkably precise over a very small spatial range, and reversed when successive stimuli reversed contrast-a neural correlate of "reverse phi" motion perception. The maps of somecells had an unexpected, curved shape, which challenges existing models for direction selectivity.

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Documento generato il 21/01/20 alle ore 07:02:28