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Updated: Jun 3, 2026
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Operant Procedures for Assessing Behavioral Flexibility in Rats
Published on: February 15, 2015
Genetic dissection of behavioral flexibility: reversal learning in mice
Rick E Laughlin1, Tara L Grant, Robert W Williams
1Department of Psychology, University of California at Los Angeles, 90095-1563, USA.
Biological Psychiatry
|March 12, 2011
Summary
This study reveals independent genetic control over behavioral flexibility traits in mice. Dopamine D2 receptor levels and specific gene expressions are linked to reversal learning, offering insights into conditions like schizophrenia.
Area of Science:
- Neuroscience
- Behavioral Genetics
Background:
- Behavioral inflexibility is a hallmark of psychiatric disorders, linked to heritable deficits in inhibitory control.
- Understanding the genetic underpinnings of behavioral flexibility is crucial for addressing these conditions.
Purpose of the Study:
- Investigate the genetic basis of individual differences in behavioral flexibility using an operant reversal learning task in mice.
- Identify genetic and neurobiological correlates of acquisition and reversal learning.
Main Methods:
- Quantified discrimination acquisition and reversal learning in 51 BXD mouse strains (n=176).
- Utilized matched data on mouse sequence, gene expression (CNS), and neuroreceptor levels.
- Performed genome-wide association analysis and correlated gene expression with behavioral phenotypes.
Main Results:
- Demonstrated significant heritability for acquisition and reversal learning, with traits showing independent genetic control.
- Found a correlation between reversal learning performance and dopamine D2 receptor levels in the ventral midbrain.
- Identified a quantitative trait locus on mouse chromosome 10 associated with reversal learning and correlated specific gene expression (Syn3, Nt5dc3, Hcfc2) with this phenotype.
Conclusions:
- Reversal learning and acquisition are genetically distinct behavioral traits.
- Dopamine D2 receptors and specific gene variants contribute to individual differences in behavioral flexibility.
- This study provides a foundation for identifying genetic and neurobiological targets for complex behavioral traits relevant to psychopathology.
