The parabrachial nucleus is essential for acquisition of a conditioned odor aversion in rats

Patricia Sue Grigson, Giuseppe Scalera, Steve Reilly, Ralph Norgren

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29 Scopus citations

Abstract

Rats with bilateral ibotenic acid lesions of the gustatory zone of the parabrachial nuclei (PBN) failed to acquire a conditioned taste aversion (CTA) in Experiment 1. They also failed to acquire a conditioned odor aversion (COA) when the olfactory cue was presented on an odor disk in Experiment 2 or when it was presented in water in Experiment 3. The failure to acquire the COA was not due to an inability to detect or use olfactory stimuli because the lesioned rats displayed neophobia to a novel odor in Experiment 3 and used an olfactory cue to predict the availability of an aversive capsaicin solution in Experiment 4. Together, the results demonstrate that, as with CTA learning, PBN cell bodies are essential for the establishment of a specific association between an olfactory conditioned stimulus and a lithium chloride unconditioned stimulus.

Original languageEnglish (US)
Pages (from-to)1104-1113
Number of pages10
JournalBehavioral Neuroscience
Volume112
Issue number5
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Behavioral Neuroscience

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