Abstract
Addicts and drug-experienced animals have decision-making deficits in reversal-learning tasks and more complex 'gambling' variants. Here we show evidence that these deficits are mediated by persistent encoding of outdated associative information in the basolateral amygdala. Cue-selective neurons in the basolateral amygdala, recorded in cocaine-treated rats, failed to change cue preference during reversal learning. Further, the presence of these neurons was critical to the expression of the reversal-learning deficit in the cocaine-treated rats.
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Acknowledgements
We are grateful to S. Warrenburg at International Flavors and Fragrances for his assistance in obtaining odor compounds. This work was supported by grants from the National Institute on Drug Abuse (DA015718, G.S.), the National Institute of Neurological Diseases and Stroke (T32-NS07375, M.R.R.) and the National Institute on Deafness and other Communication Disorders (T32-DC00054, T.S.).
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T.A.S. and G.S. conceived the experiments; T.A.S., M.R.R. and D.J.C. carried out the recording work; T.A.S. and T.S. carried out the lesion work; and T.M.F. assisted with electrode construction, surgeries and histology. The data were analyzed by T.A.S. and G.S., who also cowrote the manuscript with assistance from each of the other team members.
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Supplementary information
Supplementary Fig. 1
Effect of cocaine on locomotor activity. (PDF 46 kb)
Supplementary Fig. 2
Average baseline firing rate and distribution of firing rates for neurons recorded in saline- and cocaine-treated rats. (PDF 15 kb)
Supplementary Fig. 3
Behavioral performance in saline- and cocaine-treated rats during recording sessions. (PDF 26 kb)
Supplementary Fig. 4
Effect of cocaine treatment on the percentage of cue-selective ABL neurons that normally reverse cue-preference during reversal learning. (PDF 34 kb)
Supplementary Fig. 5
Effect of cocaine and ABL lesions on locomotor activity. (PDF 49 kb)
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Stalnaker, T., Roesch, M., Franz, T. et al. Cocaine-induced decision-making deficits are mediated by miscoding in basolateral amygdala. Nat Neurosci 10, 949–951 (2007). https://doi.org/10.1038/nn1931
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DOI: https://doi.org/10.1038/nn1931
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