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Titolo:
Event-related brain potentials distinguish processing stages involved in face perception and recognition
Autore:
Eimer, M;
Indirizzi:
Univ Cambridge, Dept Expt Psychol, Cambridge CB2 3EB, England Univ Cambridge Cambridge England CB2 3EB hol, Cambridge CB2 3EB, England
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 4, volume: 111, anno: 2000,
pagine: 694 - 705
SICI:
1388-2457(200004)111:4<694:EBPDPS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN EXTRASTRIATE CORTEX; UNFAMILIAR FACES; REPETITION; REPRESENTATION; PROSOPAGNOSIA; FAMILIAR; NEURONS; REFLECT; AGNOSIA;
Keywords:
face perception; face recognition; semantic processes; attention; N400; event-related brain potential;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Eimer, M Univ Cambridge, Dept Expt Psychol, Downing St, Cambridge CB2 3EB,England Univ Cambridge Downing St Cambridge England CB2 3EB 3EB, England
Citazione:
M. Eimer, "Event-related brain potentials distinguish processing stages involved in face perception and recognition", CLIN NEU, 111(4), 2000, pp. 694-705

Abstract

Objectives: An event-related brain potential (ERP) study investigated how different processing stages involved in face identification are reflected by ERP modulations, and how stimulus repetitions and attentional set influence such effects. Methods: ERPs were recorded in response to photographs of familiar faces, unfamiliar faces, and houses. In Part I, participants had to detect infrequently presented targets (hands), in Part II, attention was either directed towards or away from the pictorial stimuli. Results: The face-specific N170 component elicited maximally at lateral temporal electrodes was not affected by Face familiarity. When compared with unfamiliar faces, familiar faces elicited an enhanced negativity between 300 and 500 ms ('N400f') which was followed by an. enhanced positivity beyond500 ms past-stimulus ('P600f'). In contrast to the 'classical' N400, theseeffects were parietocentrally distributed. They were attenuated, but stillreliable, for repeated presentations of familiar faces. When attention wasdirected to another demanding task, no 'N400f' was elicited, but We 'P600f' effect remained to be present. Conclusions: While the N170 reflects the pre-categorical structural encoding of faces, the 'N400f' and 'P600f' are likely to indicate subsequent processes involved in face recognition. Impaired structural encoding can resultin the disruption of face identification. This if; illustrated by a neuropsychological case study, demonstrating the absence of the N170 and later ERP indicators of face recognition in a prosopagnosic patient. (C) 2000 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 17/02/20 alle ore 17:21:10