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Titolo:
A componential analysis of the ERP elicited by novel events using a dense electrode array
Autore:
Spencer, KM; Dien, J; Donchin, E;
Indirizzi:
UnivUSAlinois, Cognit Psychophysiol Lab, Dept Psychol, Champaign, IL 61820Univ Illinois Champaign IL USA 61820 b, Dept Psychol, Champaign, IL 61820 Univ Illinois, Beckman Inst, Champaign, IL 61820 USA Univ Illinois Champaign IL USA 61820 eckman Inst, Champaign, IL 61820 USA Univ Calif Davis, Ctr Neurosci, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 is, Ctr Neurosci, Davis, CA 95616 USA
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 3, volume: 36, anno: 1999,
pagine: 409 - 414
SICI:
0048-5772(199905)36:3<409:ACAOTE>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
NOVELTY; STIMULI;
Keywords:
P300; novelty P3; dense electrode arrays; PCA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Donchin, E Univmpaign,is, Cognit Psychophysiol Lab, Dept Psychol, 603 E Daniel St, Cha Univ Illinois 603 E Daniel St Champaign IL USA 61820 el St, Cha
Citazione:
K.M. Spencer et al., "A componential analysis of the ERP elicited by novel events using a dense electrode array", PSYCHOPHYSL, 36(3), 1999, pp. 409-414

Abstract

In this study, we examined the relationship between the novelty P3 and theP300 components of the brain event-related potential (ERP). Fifteen subjects responded manually to the rare stimuli embedded either in a classical auditory oddball series or in a series in which "novel" stimuli were inserted. The electroencephalogram (EEG) was recorded with a dense array of 129 electrodes. The data were analyzed by using spatial Principal Components Analysis (PCA) to identify a set of orthogonal scalp distributions, "virtual electrodes" that account for the spatial variance. The data were then expressed as ERPs measured at each of the virtual electrodes. These ERPs were analyzed using temporal PCA, yielding a set of "virtual epochs. " Most of the temporal variance of the rare events was associated with a virtual electrode with a posterior topography, that is, with a classical P300, which was active during the virtual epoch associated with the P300. The novel stimuli werefound to elicit both a classical P300 and a component focused on a virtualelectrode with a frontal topography. We propose that the term Novelty P3 should be restricted to this frontal component.

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Documento generato il 02/04/20 alle ore 18:59:18