title: Amygdala central nucleus function is necessary for learning, but not expression, of conditioned auditory orienting.
abstract: In Pavlovian appetitive conditioning, rats often acquire 2 classes of conditioned responses: those whose form is determined by the reinforcer, and those whose form is determined by characteristics of the conditioned stimulus (CS). Consistent with the results of previous lesion studies, reversible inactivation of amygdala central nucleus function during pairings of an auditory CS with food prevented the acquisition of conditioned orienting responses specific to auditory CSs, whereas food-related conditioned behaviors were acquired normally. Neither inactivation nor posttraining neurotoxic lesions of the central nucleus affected the expression of previously acquired conditioned orienting. Thus, although the central nucleus is critical to the acquisition of information required for conditioned orienting to auditory cues, it is not needed for maintaining this information for later use.
authors.affiliation: Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218, USA.
authors.forename: Frank
authors.initials: F
authors.lastname: Groshek
authors.forename: Erin
authors.initials: E
authors.lastname: Kerfoot
authors.forename: Vanessa
authors.initials: V
authors.lastname: McKenna
authors.forename: Alan S
authors.initials: AS
authors.lastname: Polackwich
authors.forename: Michela
authors.initials: M
authors.lastname: Gallagher
authors.forename: Peter C
authors.initials: PC
authors.lastname: Holland
mesh_terms: D000679:Amygdala / Q000502:physiology*; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D003214:Conditioning, Classical; D007858:Learning; D008297:Male; D051381:Rats; D020318:Rats, Long-Evans
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