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Related Experiment Video

Updated: Jul 4, 2026

Moderate Prenatal Alcohol Exposure and Quantification of Social Behavior in Adult Rats

Moderate Prenatal Alcohol Exposure and Quantification of Social Behavior in Adult Rats

Published on: December 14, 2014

Rats bred for high alcohol drinking are more sensitive to delayed and probabilistic outcomes.

C J Wilhelm¹, S H Mitchell

¹Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR 97239, USA. wilhelmc@ohsu.edu

Genes, Brain, and Behavior

|June 4, 2008

Summary

Genetically predisposed high alcohol drinking (HAD) rats show higher impulsivity than low alcohol drinking (LAD) rats. This suggests genetic factors influence sensitivity to delayed and probabilistic rewards, potentially predicting alcohol consumption.

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Area of Science:

Neuroscience
Behavioral Genetics
Addiction Research

Background:

Heavy alcohol consumption is linked to higher impulsivity.
Genetic factors may predispose individuals to alcohol dependence and impulsivity.

Purpose of the Study:

To investigate the role of genetics in impulsivity using selectively bred rats.
To compare impulsivity measures in high alcohol drinking (HAD) and low alcohol drinking (LAD) rats.

Main Methods:

Utilized ethanol-naive high alcohol drinking (HAD) and low alcohol drinking (LAD) rat models.
Administered delay discounting and probability discounting tasks to assess impulsivity.
Analyzed discount rates and bias in reward valuation.

Main Results:

HAD rats exhibited steeper discounting of delayed and probabilistic rewards compared to LAD rats.
Bias was strongly correlated with discount rate in both delay and probability discounting tasks.
Discount rates for probabilistic and delayed rewards showed a weak correlation.

Conclusions:

Selective breeding for high alcohol consumption correlates with increased sensitivity to delayed and probabilistic outcomes.
Genetic predisposition to heightened sensitivity to reward delays and uncertainty may predict future alcohol consumption.
Impulsivity, particularly sensitivity to delayed/probabilistic rewards, is influenced by genetic factors in alcohol consumption.