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Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety
Published on: November 11, 2022
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Long term treadmill exercise performed to chronic social isolated rats regulate anxiety behavior without improving
Ozge Selin Cevik1, Leyla Sahin1, Lulufer Tamer2
1Department of Physiology, Faculty of Medicine, Mersin University, Campus Ciftlikkoy, PO Box 33343, Mersin, Turkey.
Life Sciences
|March 22, 2018
Summary
Long-term treadmill exercise in rats did not impact learning or memory but significantly reduced anxiety behaviors. Corticosterone levels remained unchanged, suggesting exercise
Area of Science:
- Neuroscience
- Behavioral Science
- Exercise Physiology
Background:
- Stress significantly impacts emotional and cognitive functions.
- The hippocampus is crucial for learning and is affected by environmental factors like exercise.
- Chronic social isolation is a form of stress that can alter behavior and neurochemistry.
Purpose of the Study:
- To investigate the effects of long-term treadmill exercise on learning, memory, and anxiety in rats subjected to chronic social isolation.
- To determine if exercise can mitigate the negative behavioral effects of social isolation.
- To analyze corticosterone levels in response to exercise and social isolation.
Main Methods:
- Male Wistar rats were divided into four groups: control, exercise, social isolation, and social isolation + exercise.
- Social isolation was applied for 14 days.
- Exercise involved treadmill running for 4 weeks with gradually increasing duration.
- Learning was assessed using the Morris water maze, and anxiety was evaluated via open field and elevated plus maze tests.
- Corticosterone levels were measured using ELISA.
Main Results:
- Treadmill exercise significantly increased the frequency of entering the target quadrant in the Morris water maze, indicating improved spatial exploration.
- No significant differences in learning and memory were observed between groups.
- Treadmill exercise significantly reduced anxiety behaviors in the Open Field and Elevated Plus Maze tests.
- Food intake varied among groups, but body weight and water consumption did not differ significantly.
- Corticosterone levels did not show significant changes across the groups.
Conclusions:
- Long-term treadmill exercise effectively reduces anxiety levels in rats, even under conditions of chronic social isolation.
- Exercise does not appear to enhance learning and memory in this model, nor does it alter corticosterone levels.
- These findings suggest that exercise may be a valuable non-pharmacological intervention for managing anxiety-related behaviors.
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