Mar 30, 2020

Dopaminergic contributions to behavioral control under threat of punishment in rats

Psychopharmacology
Jeroen P H VerharenRoger A H Adan

Abstract

Excessive intake of rewards, such as food and drugs, often has explicit negative consequences, including the development of obesity and addiction, respectively. Thus, choosing not to pursue reward is the result of a cost/benefit decision, proper execution of which requires inhibition of behavior. An extensive body of preclinical and clinical evidence implicates dopamine in certain forms of inhibition of behavior, but it is not fully known how it contributes to behavioral inhibition under threat of explicit punishment. To assess the involvement of midbrain dopamine neurons and their corticostriatal output regions, the ventral striatum and prefrontal cortex, in control over behavior under threat of explicit (foot shock) punishment in rats. We used a recently developed behavioral inhibition task, which assesses the ability of rats to exert behavioral restraint at the mere sight of food reward, under threat of foot shock punishment. Using in vivo fiber photometry, chemogenetics, c-Fos immunohistochemistry, and behavioral pharmacology, we investigated how dopamine neurons in the ventral tegmental area, as well as its output areas, the ventral striatum and prefrontal cortex, contribute to behavior in this task. Using this multidiscip...Continue Reading

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Mentioned in this Paper

biotinylated dextran amine
Pharmacology
Food
Decision
Drug Dependence
Ventral Tegmental Area
In Vivo
Neurons
Rewards
Tissue Fiber

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