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Titolo:
Overlap of attention and movement-related activity in lateralized event-related brain potentials
Autore:
Oostenveld, R; Praamstra, P; Stegeman, DF; van Oosterom, A;
Indirizzi:
Univ Nijmegen, Dept Neurol, Nijmegen, Netherlands Univ Nijmegen NijmegenNetherlands , Dept Neurol, Nijmegen, Netherlands Univ Nijmegen, Dept Med Phys & Biophys, Nijmegen, Netherlands Univ Nijmegen Nijmegen Netherlands hys & Biophys, Nijmegen, Netherlands
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 3, volume: 112, anno: 2001,
pagine: 477 - 484
SICI:
1388-2457(200103)112:3<477:OOAAMA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISUAL SELECTIVE ATTENTION; DORSAL PREMOTOR CORTEX; SPATIAL ATTENTION; DIMENSIONAL OVERLAP; EEG; STIMULUS; SEARCH; COMPATIBILITY; PERCEPTION; ASYMMETRY;
Keywords:
event-related potentials; neural source localization; visual-spatial attention; visuomotor function; visual cortex; motor cortex; spatial stimulus-response compatibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Praamstra, P Univ Birmingham, Behav Brain Sci Ctr, Birmingham B15 2TT, W Midlands, England Univ Birmingham Birmingham W Midlands England B15 2TT ngland
Citazione:
R. Oostenveld et al., "Overlap of attention and movement-related activity in lateralized event-related brain potentials", CLIN NEU, 112(3), 2001, pp. 477-484

Abstract

Objective: In tasks that involve lateralized visuospatial attention and a lateralized motor response, the associated brain electrical potentials, i.e, the attention-related N2pc and the lateralized readiness potential, typically overlap at central scalp sites. The manifestation of the N2pc at central electrode sites is commonly attributed to electric volume conduction effects, assuming the N2pc to be generated in occipito-temporal brain areas. We evaluated this explanation in a simulation study. Methods: Using a forward modeling approach with a realistically shaped volume conduction model, we calculated the range of amplitude ratios between occipital and central electrode sites when a single source is assumed in area V4 or in area TO, at the temporo-occipital convexity. Results: A comparison of the simulated amplitude ratios with reported dataindicates that volume conduction effects from the investigated source origins in the occipito-temporal region are insufficient to explain the experimental data. Conclusions: We conclude that the anterior spread of the N2pc from its occipito-temporal maximum to central electrode sites is probably due to simultaneous attention-related activity in posterior and central brain areas. (C)2001 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 09:34:42