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Titolo:
The implementation of visual routines
Autore:
Roelfsema, PR; Lamme, VAF; Spekreijse, H;
Indirizzi:
Grad Sch Neurosci Amsterdam, Acad Med Ctr UvA, Dept Visual Syst Anal, NL-1100 AC Amsterdam, Netherlands Grad Sch Neurosci Amsterdam Amsterdam Netherlands NL-1100 AC Netherlands Netherlands Ophthalm Res Inst, NL-1100 AC Amsterdam, Netherlands Netherlands Ophthalm Res Inst Amsterdam Netherlands NL-1100 AC therlands
Titolo Testata:
VISION RESEARCH
fascicolo: 10-12, volume: 40, anno: 2000,
pagine: 1385 - 1411
SICI:
0042-6989(2000)40:10-12<1385:TIOVR>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMATE PREFRONTAL CORTEX; INFERIOR TEMPORAL CORTEX; EXTRASTRIATE AREA V4; FRONTAL EYE FIELD; SELECTIVE ATTENTION; CEREBRAL-CORTEX; PARIETAL CORTEX; MACAQUE MONKEY; SINGLE NEURONS; POP-OUT;
Keywords:
visual routines; elemental operations; firing rate modulations; object-based attention; contour integration; curve tracing; binding; texture segregation; perceptual organization; visual search;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
126
Recensione:
Indirizzi per estratti:
Indirizzo: Roelfsema, PR Grad Sch Neurosci Amsterdam, Acad Med Ctr UvA, Dept Visual Syst Anal, POB 12011, NL-1100 AC Amsterdam, Netherlands Grad Sch Neurosci Amsterdam POB 12011 Amsterdam Netherlands NL-1100 AC
Citazione:
P.R. Roelfsema et al., "The implementation of visual routines", VISION RES, 40(10-12), 2000, pp. 1385-1411

Abstract

Many visual tasks can be decomposed into a sequence of simpler subtasks. Ullman suggested that such subtasks are carried out by elemental operations that are implemented by specialized processes in the visual brain [Ullman, S. (1984). Visual routines. Cognition (18), 97-159]. According to this hypothesis, there are a limited number of elemental operations that, since theycan be applied sequentially, may nevertheless give rise to a large number of Visual routines. Examples of such elemental operations are visual search, texture segregation and contour grouping. Here we attempt to delineate how such elemental operations are implemented in the visual brain. When an image appears, feedforward processing rapidly leads to an activity pattern that is distributed across many visual areas. Thereafter, elemental operations come into play, and these are implemented by the modulation of firing rates. Firing rate modulations effectuate grouping of neural responses into coherent object representations. Moreover, they permit transfer of information from one operator to the next, which allows flexibility in the sequencingof operations. We discuss how the elemental operations provide a tool to relate cortical physiology to psychophysics, and suggest a reclassification of pre-attentive and attentive processes. (C) 2000 Elsevier Science Ltd. ALI rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 19:55:03