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Titolo:
The priming method: Imaging unconscious repetition priming reveals an abstract representation of number in the parietal lobes
Autore:
Naccache, L; Dehaene, S;
Indirizzi:
CEA, DRM, DSV, Serv Hosp Frederic Joliot,INSERM,U334, F-91401 Orsay, France CEA Orsay France F-91401 deric Joliot,INSERM,U334, F-91401 Orsay, France
Titolo Testata:
CEREBRAL CORTEX
fascicolo: 10, volume: 11, anno: 2001,
pagine: 966 - 974
SICI:
1047-3211(200110)11:10<966:TPMIUR>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; EVENT-RELATED POTENTIALS; DIRECT PARAMETER SPECIFICATION; INFERIOR TEMPORAL CORTEX; VISUAL WORD RECOGNITION; HUMAN OCCIPITAL LOBE; FUSIFORM FACE AREA; CORTICAL ACTIVATION; OBJECT RECOGNITION; BRAIN ACTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Naccache, L CEA, DRM, DSV, Serv Hosp Frederic Joliot,INSERM,U334, 4 Pl GenLeclerc, F-91401 Orsay, France CEA 4 Pl Gen Leclerc Orsay France F-91401 91401 Orsay, France
Citazione:
L. Naccache e S. Dehaene, "The priming method: Imaging unconscious repetition priming reveals an abstract representation of number in the parietal lobes", CEREB CORT, 11(10), 2001, pp. 966-974

Abstract

Most of the current brain imaging methods are limited by the low spatial resolution of neuroimaging techniques and remain unable to measure activity at the scale of single neurons or small columns of neurons, which are the coding elements of the nervous system. In this work we have adapted the priming method, an emerging research strategy that can overcome some of these spatial limitations, to investigate the coding of numerical quantities in the human brain. This approach combines the logic of psychological priming experiments with the recently discovered neurophysiological phenomenon calledrepetition suppression (RS). In each trial, while subjects perform a constant task, a subliminal prime is presented prior to each target. By varying the relationship between prime and target, one can detect which brain areaspresent HS specifically for any given level of prime-target repetition. Wefirst expose the general logic, potential and limitations of the priming method and then illustrate it by demonstrating that a region of parietal cortex is coding for numbers at the quantity level, independently of other stimulus attributes, and that this region processes both consciously and unconsciously perceived stimuli.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:09:07