1. cFos induction during conditioned taste aversion expression varies with aversion strength.
- Author
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Navarro M, Spray KJ, Cubero I, Thiele TE, and Bernstein IL
- Subjects
- Amygdala physiology, Animals, Brain cytology, Gene Expression Regulation, Lithium Chloride, Male, Medulla Oblongata physiology, Mesencephalon physiology, Pons physiology, Prosencephalon physiology, Rats, Rats, Long-Evans, Saccharin, Avoidance Learning physiology, Brain physiology, Conditioning, Operant physiology, Genes, fos, Proto-Oncogene Proteins c-fos analysis, Solitary Nucleus physiology, Taste
- Abstract
Fos-like immunoreactivity (FLI) can indicate the location of neurons activated following expression of conditioned taste aversion (CTA). After one conditioning trial FLI has been identified in the intermediate nucleus of the solitary tract (iNTS) with little expression in other brain regions. The present study assessed the effect of increasing aversion strength on the magnitude and anatomical distribution of FLI during CTA expression. When animals received three rather than one conditioning trial, significant FLI was seen not only in the iNTS but also in the parabrachial nucleus (PBN), and the central nucleus of the amygdala (CNA), regions thought to be important in taste aversion learning.
- Published
- 2000
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