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A Protocol for Measuring Cue Reactivity in a Rat Model of Cocaine Use Disorder
Published on: June 18, 2018
Cocaine exposure causes long-term increases in impulsive choice.
Nicholas W Simon1, Ian A Mendez, Barry Setlow
1Department of Psychology, Texas A&M University, College Station, TX 77843-4235, USA. nws100@neo.tamu.edu
Behavioral Neuroscience
|June 27, 2007
Summary
Cocaine exposure in rats led to long-term increases in impulsive choice behavior, characterized by a preference for immediate rewards over larger, delayed ones. This suggests enduring changes in decision-making processes following drug exposure.
Area of Science:
- Neuroscience
- Behavioral Pharmacology
- Addiction Research
Background:
- Impulsive choice is a key feature of addiction.
- Understanding the long-term neurological effects of drug exposure is crucial.
Purpose of the Study:
- To investigate the enduring impact of prior cocaine exposure on decision-making behavior.
- To assess long-term changes in impulsive choice using a delay-discounting task.
Main Methods:
- Male Long-Evans rats received daily cocaine or saline injections for 14 days.
- Following a 3-week withdrawal period, rats underwent delay-discounting task training.
- Impulsive choice was measured by preference for immediate vs. delayed food rewards.
Main Results:
- Cocaine-exposed rats exhibited significantly increased impulsive choice behavior three months post-treatment.
- These rats showed reduced anticipatory responding during delay periods.
- Findings suggest deficits in delay-based reward processing may underlie enhanced impulsivity.
Conclusions:
- Cocaine exposure can induce lasting increases in impulsive choice behavior.
- These findings align with observations in human drug addiction.
- The study highlights potential neurobiological underpinnings of persistent impulsivity after stimulant exposure.
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