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Titolo:
EVENT-RELATED POTENTIAL (ERP) ASYMMETRIES TO EMOTIONAL STIMULI IN A VISUAL HALF-FIELD PARADIGM
Autore:
KAYSER J; TENKE C; NORDBY H; HAMMERBORG D; HUGDAHL K; ERDMANN G;
Indirizzi:
NEW YORK STATE PSYCHIAT INST & HOSP,DEPT BIOPSYCHOL,BOX 50,722 W 168TH ST NEW YORK NY 10032 TECH UNIV BERLIN,INST PSYCHOL D-1000 BERLIN GERMANY UNIV BERGEN,DEPT BIOL & MED PSYCHOL BERGEN NORWAY
Titolo Testata:
Psychophysiology
fascicolo: 4, volume: 34, anno: 1997,
pagine: 414 - 426
SICI:
0048-5772(1997)34:4<414:EP(ATE>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTROPHYSIOLOGICAL EVIDENCE; FACES; BRAIN; HEMISPHERE; COMPONENT; RECOGNITION; VARIANCE; TASKS; PSYCHOPHYSIOLOGY; LATERALIZATION;
Keywords:
EVENT-RELATED POTENTIALS (ERPS); LATERALITY; EMOTION; VISUAL HALF-FIELD PARADIGM; N2-P3 AMPLITUDE; PRINCIPAL COMPONENTS ANALYSIS (PCA);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
83
Recensione:
Indirizzi per estratti:
Citazione:
J. Kayser et al., "EVENT-RELATED POTENTIAL (ERP) ASYMMETRIES TO EMOTIONAL STIMULI IN A VISUAL HALF-FIELD PARADIGM", Psychophysiology, 34(4), 1997, pp. 414-426

Abstract

To investigate the hypothesis of a right hemispheric superiority in negative emotional processing, event-related potentials (ERPs) were recorded from 17 sites (Fz, Cz, Pz, F3/4, F7/8, C3/4, T7/8, P3/4, P7/8, O1/2) in a visual half-field paradigm. While maintaining fixation, right-handed women viewed pictures of patients with dermatological diseases before (negative) and after (neutral) cosmetic surgery. A principal components analysis with Varimax rotation performed on ERPs revealed factors identified as N1, N2, early P3, late P3, and slow wave. Repeated measures analyses of variance performed on factor scores revealed a significant effect of emotional content for all factors except for N1. However, asymmetries in emotional processing were restricted to N2 and early P3, with maximal effects over the right parietal region. N2-P3amplitude was augmented for negative and reduced for neutral stimuli over right hemisphere regions. Visual field presentation interacted with these asymmetries in enhancing amplitudes contralaterally for earlybut ipsilaterally for late ERP components. Overall, findings for N2 and P3 support theories of an asymmetry in emotional processing.

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Documento generato il 02/12/20 alle ore 18:24:02