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Titolo:
Aversive learning in patients with unilateral lesions of the amygdala and hippocampus
Autore:
Peper, M; Karcher, S; Wohlfarth, R; Reinshagen, G; LeDoux, JE;
Indirizzi:
Univ Freiburg, Dept Psychol, D-79085 Freiburg, Germany Univ Freiburg Freiburg Germany D-79085 sychol, D-79085 Freiburg, Germany Epilepsy Ctr Freiburg Kork, D-77694 Kehl, Germany Epilepsy Ctr Freiburg Kork Kehl Germany D-77694 k, D-77694 Kehl, Germany NYU, Ctr Neural Sci, New York, NY 10003 USA NYU New York NY USA 10003NYU, Ctr Neural Sci, New York, NY 10003 USA
Titolo Testata:
BIOLOGICAL PSYCHOLOGY
fascicolo: 1, volume: 58, anno: 2001,
pagine: 1 - 23
SICI:
0301-0511(200109)58:1<1:ALIPWU>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SKIN-CONDUCTANCE RESPONSES; FACIAL EMOTIONAL EXPRESSIONS; TEMPORAL LOBECTOMY; FEAR; RECOGNITION; DAMAGE; STIMULI; HUMANS; INFORMATION; ASYMMETRY;
Keywords:
aversive learning; conditioning; facial expression; amygdala; hippocampus; emotion; lesion method;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
82
Recensione:
Indirizzi per estratti:
Indirizzo: Peper, M Univ Freiburg, Dept Psychol, Niemensstr 10, D-79085 Freiburg, Germany Univ Freiburg Niemensstr 10 Freiburg Germany D-79085 rg, Germany
Citazione:
M. Peper et al., "Aversive learning in patients with unilateral lesions of the amygdala and hippocampus", BIOL PSYCH, 58(1), 2001, pp. 1-23

Abstract

The present study applied a visual half field paradigm with emotional facial expressions in patients with selective unilateral amygdalo-hippocampectomy (AHE) to elucidate the contributions of the left and right medial temporal lobe and amygdala to emotional learning. Electrodermal indicators of aversive learning were studied in 14 left AHE and 12 right AHE patients, as well as 13 controls matched in sex and age. In a differential conditioning paradigm with negative (CS+) and positive (CS-) facial expressions, CS+ were associated with an aversive vocalization (US, 95 dB, 3 s). During extinction, stimuli were presented laterally and preattentively using backward masking. Appropriate CS durations yielding preattentive presentation were individually determined prior to conditioning. In contrast to controls, both leftand right AHE patients failed to show an autonomic conditioning effect following left visual field presentations of masked negative CS+ during extinction. AHE patients also showed no clear differential acquisition. Moreover,right AHE patients poorly recognised that negative valence was an affiliating dimension of the CS-US compound. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 18:37:21