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Titolo:
ELECTROPHYSIOLOGICAL STUDIES OF FACE PERCEPTION IN HUMANS
Autore:
BENTIN S; ALLISON T; PUCE A; PEREZ E; MCCARTHY G;
Indirizzi:
HEBREW UNIV JERUSALEM,DEPT PSYCHOL IL-91905 JERUSALEM ISRAEL W HAVEN VET AFFAIRS MED CTR W HAVEN CT 00000 YALE UNIV,SCH MED NEW HAVEN CT 06520
Titolo Testata:
Journal of cognitive neuroscience
fascicolo: 6, volume: 8, anno: 1996,
pagine: 551 - 565
SICI:
0898-929X(1996)8:6<551:ESOFPI>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERIOR TEMPORAL SULCUS; HUMAN EXTRASTRIATE CORTEX; VISUAL EVOKED-POTENTIALS; EVENT-RELATED POTENTIALS; INFEROTEMPORAL CORTEX; FACIAL RECOGNITION; FAMILIAR FACES; PROSOPAGNOSIA; NEURONS; MONKEY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
77
Recensione:
Indirizzi per estratti:
Citazione:
S. Bentin et al., "ELECTROPHYSIOLOGICAL STUDIES OF FACE PERCEPTION IN HUMANS", Journal of cognitive neuroscience, 8(6), 1996, pp. 551-565

Abstract

Event-related potentials (ERPs) associated with face perception were recorded with scalp electrodes from normal volunteers. Subjects performed a visual target detection task in which they mentally counted the number of occurrences of pictorial stimuli from a designated category such as butterflies. In separate experiments, target stimuli were embedded within a series of other stimuli including unfamiliar human facesand isolated face components, inverted faces, distorted faces, animalfaces, and other nonface stimuli. Human faces evoked a negative potential at 172 msec (N170), which was absent from the ERPs elicited by other animate and inanimate nonface stimuli. N170 was largest over the posterior temporal scalp and was larger over the right than the left hemisphere. N170 was delayed when faces were presented upside-down, but its amplitude did not change. When presented in isolation, eyes elicited an N170 that was significantly larger than that elicited by whole faces, while noses and lips elicited small negative ERPs about 50 msec later than N170. Distorted human faces, in which the locations of inner face components were altered, elicited an N170 similar in amplitude to that elicited by normal faces. However, faces of animals, human hands, cars, and items of furniture did not evoke N170. N170 may reflect the operation of a neural mechanism tuned to detect (as opposed to identify) human faces, similar to the ''structural encoder'' suggested byBruce and Young (1986). A similar function has been proposed for the face-selective N200 ERP recorded from the middle fusiform and posterior inferior temporal gyri using subdural electrodes in humans (Allison,McCarthy, Nobre, Puce, & Berger, 1994c). However, the differential sensitivity of N170 to eyes in isolation suggests that N170 may reflect the activation of an eye-sensitive region of cortex. The voltage distribution of N170 over the scalp is consistent with a neural generator located in the occipitotemporal sulcus lateral to the fusiform/inferiortemporal region that generates N200.

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Documento generato il 06/04/20 alle ore 07:22:11