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A computational analysis of mouse behavior in the sucrose preference test
Jeroen P H Verharen1, Johannes W de Jong1, Yichen Zhu1
1Department of Molecular and Cell Biology and Helen Wills Neuroscience Institute, University of California, Berkeley, CA, 94720, USA.
Nature Communications
|April 27, 2023
Summary
The sucrose preference test (SPT) reveals complex behaviors beyond simple reward. Stress impacts SPT results differently in males and females, and optogenetics may affect learning, not just hedonic responses.
Area of Science:
- Neuroscience
- Behavioral Science
- Animal Models
Background:
- The sucrose preference test (SPT) is widely used to assess hedonic behavior in rodents.
- Its ability to reflect other behavioral components like learning, memory, motivation, and choice remains unclear.
Purpose of the Study:
- To experimentally and computationally decompose mouse behavior in the SPT.
- To identify unrecognized behavioral subcomponents influencing sucrose preference.
- To investigate the sex-dependent effects of stress and optogenetics on hedonic behavior and learning.
Main Methods:
- Experimental and computational analysis of mouse behavior during the SPT.
- Application of acute and chronic stress paradigms.
- Utilizing optogenetics to modulate neural activity.
- Analyzing sex-specific behavioral responses.
Main Results:
- Discovered previously unrecognized behavioral subcomponents within the SPT.
- Observed sex-dependent effects of acute and chronic stress on sucrose preference.
- Anhedonia was specifically linked to chronic stress in male mice.
- Reduced sucrose preference from optogenetics could indicate learning deficits, not solely anhedonia.
- Minor experimental variations significantly impacted task outcomes and interpretations.
Conclusions:
- The SPT, while seemingly simple, exhibits high behavioral complexity.
- Dissecting behavior into subcomponents is crucial for accurate neurobiological interpretation.
- Stress and experimental manipulations have nuanced effects on rodent behavior and reward processing.
