Related Experiment Video
Updated: Nov 24, 2025
Social Isolation Model: A Noninvasive Rodent Model of Stress and Anxiety
Published on: November 11, 2022
Social isolation is closely linked to a marked reduction in physical activity in male mice
Kelly Clemenza1,2, Shira H Weiss1,2, Keely Cheslack1,2
1Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA.
Abstract:
The effects of social isolation on an individual's behavior is an important field of research, especially as public health officials encourage social distancing to prevent the spread of pandemic disease. In this study we evaluate the effects of social isolation on physical activity in mice. Utilizing a pixel-based tracking system, we continuously monitored the movement of isolated mice compared with paired cage mates in the home cage environment. We demonstrate that mice that are socially isolated dramatically decrease their movement when separated from their cage mate, and especially in the dark cycle, when mice are normally most active. When isolated mice are re-paired with their original cage mate, this effect is reversed, and mice return to their prior levels of activity. These findings suggest a close link between social isolation and physical activity, and are of particular interest in the wake of coronavirus disease 2019, when many are forced into isolation. Social isolation may affect an individual's overall activity levels in humans too, which may have unintended effects on health that deserve further consideration.
Insights
Social isolation significantly reduces physical activity in mice, particularly during their active periods. Reintroducing social contact restores normal movement levels, highlighting a link between social behavior and activity.
Area of Science:
- Behavioral Neuroscience
- Animal Behavior Studies
Background:
- Social isolation is a growing concern, particularly with public health measures like social distancing.
- Understanding the behavioral impacts of isolation is crucial for public health.
Purpose of the Study:
- To investigate the effects of social isolation on physical activity levels in mice.
- To determine if social interaction influences activity patterns.
Main Methods:
- Utilized a pixel-based tracking system to monitor mouse movement.
- Compared activity levels of isolated mice with paired cage mates in a home cage environment.
- Observed changes in activity following social re-pairing.
Main Results:
- Socially isolated mice showed a dramatic decrease in movement compared to paired mice.
- Activity reduction was most pronounced during the dark cycle, a period of natural high activity.
- Re-pairing mice reversed the decrease in activity, returning them to prior levels.
Conclusions:
- A strong correlation exists between social isolation and reduced physical activity in mice.
- Findings are relevant to understanding the potential health impacts of isolation, such as during the COVID-19 pandemic.
- Social isolation may negatively affect human activity levels, warranting further health considerations.
