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Titolo:
RESPONSES OF COMPLEX CELLS IN AREA-17 OF THE CAT TO BI-VECTORIAL TRANSPARENT MOTION
Autore:
VANWEZEL RJA; LANKHEET MJM; VERSTRATEN FAJ; MAREE AFM; VANDEGRIND WA;
Indirizzi:
CTR NEUROSCI,1544 NEWTON COURT DAVIS CA 95616 UNIV UTRECHT,HELMHOLTZ INST NL-3584 CH UTRECHT NETHERLANDS UNIV UTRECHT,DEPT COMPARAT PHYSIOL NL-3584 CH UTRECHT NETHERLANDS
Titolo Testata:
Vision research
fascicolo: 18, volume: 36, anno: 1996,
pagine: 2805 - 2813
SICI:
0042-6989(1996)36:18<2805:ROCCIA>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
FELINE VISUAL-CORTEX; STRIATE CORTEX; DIRECTION SELECTIVITY; RECEPTIVE-FIELDS; MOVING PATTERNS; SINGLE NEURONS; PERCEPTION; ORIENTATION; NOISE; ORGANIZATION;
Keywords:
TRANSPARENT MOTION; AREA 17; COMPLEX CELL; VISUAL CORTEX; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
R.J.A. Vanwezel et al., "RESPONSES OF COMPLEX CELLS IN AREA-17 OF THE CAT TO BI-VECTORIAL TRANSPARENT MOTION", Vision research, 36(18), 1996, pp. 2805-2813

Abstract

We examined the responses to transparent motion of complex cells in cat area 17 which show directional selectivity to moving random pixel arrays (RPAs). The response to an RPA moving in the cell's preferred direction is inhibited when a second RPA is transparently moving in another direction. The inhibition by the second pattern is quantified as afunction of its direction. The response to a pattern moving in the preferred direction is never completely suppressed, not even when a second pattern is moving transparently in the opposite direction. To the extent that supra-spontaneous firing rates signal the presence of the optimal velocity vector, these cells therefore still signal the presence of this line-label stimulus despite additional opposing, or otherwise directed, motion components. The results confirm previous suggestions that, for the computation of motion energy in cat area 17 complex cells,a full opponent stage is not plausible. Furthermore, we show that the response to a combination of two motion vectors can be predicted by the average of the responses to the individual components. Copyright(C) 1996 Elsevier Science Ltd.

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Documento generato il 03/12/20 alle ore 05:11:53