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Titolo:
Visuospatial attention and motor reaction in children: An electrophysiological study of the "Posner" paradigm
Autore:
Perchet, C; Garcia-Larrea, L;
Indirizzi:
Hop Neurol, CERMEP, Lab Neurophysiol Humaine, F-69003 Lyon, France Hop Neurol Lyon France F-69003 europhysiol Humaine, F-69003 Lyon, France Univ Lyon 1, CERMEP, Clin Neurophysiol Lab, Res Unit UPRES EA1880, F-69365Lyon, France Univ Lyon 1 Lyon France F-69365 s Unit UPRES EA1880, F-69365Lyon, France
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 2, volume: 37, anno: 2000,
pagine: 231 - 241
SICI:
0048-5772(200003)37:2<231:VAAMRI>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; BILATERAL STIMULUS ARRAYS; INDEX FOCUSED ATTENTION; REACTION-TIME; SELECTIVE ATTENTION; MENTAL CHRONOMETRY; VISUAL-ATTENTION; P300 LATENCY; HUMAN-BRAIN; COMPONENTS;
Keywords:
children; Posner paradigm; attention shifting; event-related potentials; reaction time; P3;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Garcia-Larrea, L Hop Neurol, CERMEP, Lab Neurophysiol Humaine, 59 Bd Pinel, F-69003 Lyon, France Hop Neurol 59 Bd Pinel Lyon France F-69003 Lyon, France
Citazione:
C. Perchet e L. Garcia-Larrea, "Visuospatial attention and motor reaction in children: An electrophysiological study of the "Posner" paradigm", PSYCHOPHYSL, 37(2), 2000, pp. 231-241

Abstract

To assess the processing stages involved in attention shifting and response selection tasks in children, we recorded event-related potentials (ERPs) and performance measures during a variant of the Posner paradigm. Subjects responded to visual targets, either preceded by a spatial cue (valid = sameside; invalid = opposite side) or presented uncued. Valid targets evoked high-amplitude pi responses, single-peaked P3s, and the shortest reaction times (RTs). Invalidly cued stimuli evoked delayed RTs, resulting in part from incorrectly oriented attention (decreased P1) leading to delayed target processing (belated N2-P3). Invalid targets also evoked a positive slow waveattributed to prolonged response selection due to cue/target incompatibility. Uncued stimuli elicited the longest RTs, unexplained by deficits in target detection or response selection, which likely resulted from a deficit in motor preparation due to the lack of warning signal. This method may be applied in clinical settings to disentangle selective processing deficits intarget detection, response selection, or motor preparation stages.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 13:47:15