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Titolo:
Simulation of neuronal responses defining depth order and contrast polarity at illusory contours in monkey area V2
Autore:
Peterhans, E; Heitger, F;
Indirizzi:
Univ Zurich Hosp, Dept Neurol, CH-8091 Zurich, Switzerland Univ Zurich Hosp Zurich Switzerland CH-8091 CH-8091 Zurich, Switzerland Ctr Suisse Elect & Microtech SA, Neuchatel, Switzerland Ctr Suisse Elect &Microtech SA Neuchatel Switzerland atel, Switzerland
Titolo Testata:
JOURNAL OF COMPUTATIONAL NEUROSCIENCE
fascicolo: 2, volume: 10, anno: 2001,
pagine: 195 - 211
SICI:
0929-5313(200103)10:2<195:SONRDD>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIMULTANEOUS BRIGHTNESS CONTRAST; FIGURE-GROUND SEGREGATION; CAT STRIATE CORTEX; END-STOPPED CELLS; VISUAL-CORTEX; SUBJECTIVE CONTOURS; RECEPTIVE-FIELDS; HYPERCOMPLEX CELLS; 3-DIMENSIONAL FORM; CORTICAL DYNAMICS;
Keywords:
alert monkey; illusory contours; figure-ground segregation; contrast polarity; brightness illusion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
75
Recensione:
Indirizzi per estratti:
Indirizzo: Peterhans, E Univ Zurich Hosp, Dept Neurol, CH-8091 Zurich, Switzerland Univ Zurich Hosp Zurich Switzerland CH-8091 ch, Switzerland
Citazione:
E. Peterhans e F. Heitger, "Simulation of neuronal responses defining depth order and contrast polarity at illusory contours in monkey area V2", J COMPUT N, 10(2), 2001, pp. 195-211

Abstract

Neurophysiological, brain imaging, and perceptual studies in animals and humans suggest that illusory (occluding) contours are represented at an early level of visual cortical processing. Comparatively little is known about the mechanisms defining the depth order and the brightness illusion associated with such contours. Baumann et al. (1997) found neurons in area V2 of the alert monkey that signaled not only illusory contours but also the figure-ground direction that human observers perceive at such contours. The majority of these neurons showed this property independent stimulus contrast; asmall minority preferred a certain combination of figure-ground direction and contrast polarity at these contours. In this article, we simulate the responses of these neurons by means of a grouping mechanism that uses occlusion cues (line-ends, corners) to define figure-ground direction and contrast polarity at such contours.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 10:25:14