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Titolo:
Attention response functions: Characterizing brain areas using fMRI activation during parametric variations of attentional load
Autore:
Culham, JC; Cavanagh, P; Kanwisher, NG;
Indirizzi:
Univ Western Ontario, Dept Psychol, London, ON N6A 5C2, Canada Univ Western Ontario London ON Canada N6A 5C2 London, ON N6A 5C2, Canada Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA Harvard Univ Cambridge MA USA 02138 Dept Psychol, Cambridge, MA 02138 USA MIT, Dept Brain & Cognit Sci, Cambridge, MA 02139 USA MIT Cambridge MA USA 02139 pt Brain & Cognit Sci, Cambridge, MA 02139 USA Massachusetts Gen Hosp, NMR Ctr, Charlestown, MA 02129 USA Massachusetts Gen Hosp Charlestown MA USA 02129 Charlestown, MA 02129 USA
Titolo Testata:
NEURON
fascicolo: 4, volume: 32, anno: 2001,
pagine: 737 - 745
SICI:
0896-6273(20011120)32:4<737:ARFCBA>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRONTAL EYE-FIELD; POSITRON EMISSION TOMOGRAPHY; HUMAN VISUAL-CORTEX; SPATIAL ATTENTION; WORKING-MEMORY; CEREBRAL-CORTEX; SINGLE NEURONS; SACCADES; MOVEMENTS; MODULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Culham, JC Univ Western Ontario, Dept Psychol, London, ON N6A 5C2, Canada Univ Western Ontario London ON Canada N6A 5C2 N6A 5C2, Canada
Citazione:
J.C. Culham et al., "Attention response functions: Characterizing brain areas using fMRI activation during parametric variations of attentional load", NEURON, 32(4), 2001, pp. 737-745

Abstract

We derived attention response functions for different cortical areas by plotting neural activity (measured by fMRI) as a function of attentional loadin a visual tracking task. In many parietal and frontal cortical areas, activation increased with load over the entire range of loads tested, suggesting that these areas are directly involved in attentional processes. However, in other areas (FEF and parietal area 7), strong activation was observedeven at the lowest attentional load (compared to a passive baseline using identical stimuli), but little or no additional activation was seen with increasing load. These latter areas appear to play a different role, perhaps supporting task-relevant functions that do not vary with load, such as the suppression of eye movements.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 22:22:44