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Taste, olfactory and trigeminal neophobia in rats with forebrain lesions

Authors
Journal
Brain Research
0006-8993
Publisher
Elsevier
Publication Date
Volume
1251
Identifiers
DOI: 10.1016/j.brainres.2008.11.040
Keywords
  • Neophobia
  • Insular Cortex
  • Amygdala
  • Rat
Disciplines
  • Design

Abstract

Abstract The present study was designed to examine whether lesions of the insular cortex (IC; Experiment 1), the basolateral amygdala (BLA) or medial amygdala (MeA; Experiment 2) influence the neophobic reactions to orally consumed liquid stimuli. Three different types of stimuli were used: taste (0.5% saccharin), olfactory (0.1% amyl acetate), and trigeminal (0.01 mM capsaicin). Rats with IC, BLA and MeA lesions showed normal responses to the olfactory and trigeminal stimuli. Each type of lesion, however, disrupted the initial occurrence of neophobia to the taste stimulus. The significance of these findings to conditioned taste aversion is discussed.

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