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Titolo:
RESPONSES OF COMPLEX CELLS IN CAT AREA-17 TO APPARENT MOTION OF RANDOM PIXEL ARRAYS
Autore:
VANWEZEL RJA; LANKHEET MJM; FREDERICKSEN RE; VERSTRATEN FAJ; VANDEGRIND WA;
Indirizzi:
CTR NEUROSCI,1544 NEWTON COURT DAVIS CA 95616 UNIV UTRECHT,HELMHOLTZ RES INST NL-3584 CH UTRECHT NETHERLANDS UNIV UTRECHT,DEPT COMPARAT PHYSIOL NL-3584 CH UTRECHT NETHERLANDS
Titolo Testata:
Vision research
fascicolo: 7, volume: 37, anno: 1997,
pagine: 839 - 852
SICI:
0042-6989(1997)37:7<839:ROCCIC>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
RANDOM-DOT PATTERNS; DIRECTION-SELECTIVE NEURONS; SPACE-TIME SEPARABILITY; VISUAL-CORTEX NEURONS; SPATIAL WHITE NOISE; STRIATE CORTEX; RECEPTIVE-FIELDS; TEMPORAL INTEGRATION; CORTICAL-CELLS; SHORT-RANGE;
Keywords:
MOTION DETECTION; APPARENT MOTION; VISUAL CORTEX; COMPLEX CELL; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
65
Recensione:
Indirizzi per estratti:
Citazione:
R.J.A. Vanwezel et al., "RESPONSES OF COMPLEX CELLS IN CAT AREA-17 TO APPARENT MOTION OF RANDOM PIXEL ARRAYS", Vision research, 37(7), 1997, pp. 839-852

Abstract

The characteristics of directionally selective cells in area 17 of the cat are studied using moving random pixel arrays (RPAs) with 50% white and 50% black pixels. The apparent motion stimulus is similar to that used in human psychophysics Fredericksen et al. (1993). Vision Research, 33, pp. 1193-1205]. We compare motion sensitivity measured with single-step pixel lifetimes and unlimited pixel lifetimes. A motion stimulus with a single-step pixel lifetime contains directional motion energy primarily at one combination of spatial displacement and temporal delay. We recorded the responses of complex cells to different combinations of displacement and delay to describe their spatio-temporal correlation characteristics. The response to motion of RPAs with unlimited lifetime is strongest along the preferred speed line in a delay vs displacement size diagram. When using an RPA with a single-step pixel lifetime, the cells are responsive to a much smaller range of spatial displacements and temporal delays of the stimulus. The maximum displacement that still gives a directionally selective response is larger when the preferred speed of the cell is higher. It is on average about three times smaller than the receptive held size. (C) 1997 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 05:25:00