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1 Acta Neurobiologiae Experimentalis

1 2015

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Lesions of the central nucleus of the amygdala only impair flavor aversion learning in the absence of olfactory information

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Aguera A. D. R. , Puerto A.

Acta Neurobiologiae Experimentalis

2015

tom 75

nr 4

The amygdala is considered a crucial brain nucleus in different modalities of aversive conditioning, including flavor aversion learning (FAL). The importance attributed to the amygdala and its subnuclei has frequently depended on the different stimuli and procedures used in FAL tasks. In this study, FAL was impaired only in animals that had lesions in the central nucleus of the amygdala (CeA) area and also had their olfactory bulbs removed. However, this task was learned by neurologically intact animals, bulbectomized animals, and rats with lesions exclusively centered in the CeA area alone. These results suggest that the CeA area may be relevant in gustatory-gut associative learning but not in FAL, in which the olfactory system may counteract the deficit produced in taste-visceral convergence.