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Published on: September 18, 2012
Exploratory rearing: a context- and stress-sensitive behavior recorded in the open-field test
Oliver Sturman1, Pierre-Luc Germain2, Johannes Bohacek1
1a Department of Health Sciences and Technology, Lab of Molecular and Behavioral Neuroscience , ETH Zurich , Zurich , Switzerland.
Spontaneous rearing in rodents, a behavior often overlooked in anxiety studies, shows promise as a stress indicator. Unsupported rearing, specifically, is sensitive to acute stress and context, offering a stable measure for repeated testing.
Area of Science:
- Neuroscience
- Animal Behavior
- Psychology
Background:
- Stressful experiences correlate with anxiety disorders in humans.
- Rodent models are crucial for studying anxiety, often using open-field tests.
- Spontaneous rearing behavior in rodents is frequently disregarded in anxiety research.
Purpose of the Study:
- To investigate spontaneous rearing behaviors in rodents as potential anxiety indicators.
- To differentiate between supported and unsupported rearing.
- To assess the sensitivity of rearing behaviors to stress and context.
Main Methods:
- Utilized an automated open-field test for rodent behavioral analysis.
- Defined and quantified two distinct rearing behaviors: supported and unsupported.
- Examined sex differences and the impact of acute stress and testing conditions on rearing.
Main Results:
- Both supported and unsupported rearing are context-dependent with notable sex differences (females rear less than males).
- Unsupported rearing is reduced under acute stress and more aversive conditions.
- Unsupported rearing demonstrated stability within individual animals across repeated testing sessions.
Conclusions:
- Spontaneous rearing, particularly unsupported rearing, serves as a sensitive indicator of anxiety in rodents.
- These behaviors are highly context-dependent and exhibit sex differences.
- Rearing behaviors offer a valuable, stable measure for repeated testing in behavioral anxiety studies.
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