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Titolo:
Disruption of contextual freezing, but not contextual blocking of fear-potentiated startle, after lesions of the dorsal hippocampus
Autore:
McNish, KA; Gewirtz, JC; Davis, M;
Indirizzi:
Emory Univ, Dept Psychiat, Atlanta, GA 30322 USA Emory Univ Atlanta GA USA 30322 niv, Dept Psychiat, Atlanta, GA 30322 USA Yale Univ, Dept Psychol, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 v, Dept Psychol, New Haven, CT 06520 USA Yale Univ, Dept Psychiat, New Haven, CT 06520 USA Yale Univ New Haven CT USA 06520 , Dept Psychiat, New Haven, CT 06520 USA
Titolo Testata:
BEHAVIORAL NEUROSCIENCE
fascicolo: 1, volume: 114, anno: 2000,
pagine: 64 - 76
SICI:
0735-7044(200002)114:1<64:DOCFBN>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTROLYTIC LESIONS; NEUROTOXIC LESIONS; TASTE-AVERSION; RATS; AMYGDALA; ACQUISITION; STIMULI; MEMORY; INHIBITION; NEOPHOBIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Davis, M Emory Univ, Dept Psychiat, 1639 Pierce Dr,Suite 4000, Atlanta, GA30322 USA Emory Univ 1639 Pierce Dr,Suite 4000 Atlanta GA USA 30322 322 USA
Citazione:
K.A. McNish et al., "Disruption of contextual freezing, but not contextual blocking of fear-potentiated startle, after lesions of the dorsal hippocampus", BEHAV NEURO, 114(1), 2000, pp. 64-76

Abstract

The role of the dorsal hippocampus in contextual fear conditioning was investigated with a contextual blocking paradigm. In Experiment 1, rats were given pairings of a light conditioned stimulus (CS) and footshock after preexposure either to footshock or to the context alone. The group preexposed to footshock showed poorer fear conditioning to the light CS, as measured bythe fear-potentiated startle reflex. In Experiment 2, a group preexposed to footshock in the same context showed poorer fear conditioning to the light CS than did a group preexposed to footshock in a different context, indicating contextual blocking of fear-potentiated startle. In Experiment 3, lesions of the dorsal hippocampus had no effect on contextual blocking, even though contextual freezing was disrupted. The sparing of contextual blockingindicated that contextual memory was intact following hippocampal lesions,despite the disruption of contextual freezing.

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Documento generato il 29/03/20 alle ore 17:36:39