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Common genetic effects on variation in impulsivity and activity in mice
Anthony R Isles1, Trevor Humby, Eurof Walters
1Neurobiology and Developmental Genetics Programmes, The Babraham Institute, Babraham, Cambridge CB2 4AT, United Kingdom.
Summary
Genetic factors influence impulsivity and locomotor activity in mice. This study used inbred mouse strains to show that genes contribute to impulsive choices and activity levels, which often occur together.
Area of Science:
- Behavioral genetics
- Neuroscience
- Animal behavior
Background:
- Impulsivity is a complex trait with genetic underpinnings, often linked to conditions like ADHD.
- Understanding the genetic basis of impulsivity is crucial for behavioral research.
Purpose of the Study:
- To investigate the genetic contribution to impulsive behaviors in mice.
- To examine the relationship between impulsivity and locomotor activity.
Main Methods:
- Utilized four isogenic inbred mouse strains in a novel delayed-reinforcement paradigm.
- Employed cross-fostering to control for maternal effects.
- Assessed impulsive choice and independent measures of locomotor activity.
Main Results:
- Significant strain differences were observed in impulsive choice and locomotor activity.
- Heritability analysis indicated a genetic component for both behaviors.
- Impulsivity and locomotor activity co-varied, suggesting shared genetic factors.
Conclusions:
- Genetic factors significantly influence impulsive behavior and locomotor activity in mice.
- Common genetic influences may underlie the co-occurrence of impulsivity and hyperactivity.
- Further research can explore candidate genes and gene-environment interactions.