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Related Experiment Video

Updated: Jun 12, 2026

Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa

Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa

Published on: October 22, 2015

Adolescent activity-based anorexia increases anxiety-like behavior in adulthood.

Kimberly P Kinzig¹, Sara L Hargrave

¹Department of Psychological Sciences, Ingestive Behavior Research Center, Purdue University, West Lafayette, IN 47907, USA. kkinzig@psych.purdue.edu

Physiology & Behavior

|June 23, 2010

Summary

Adolescent activity-based anorexia in rats leads to lasting anxiety-like behaviors and heightened stress responses in adulthood. This research models prolonged anxiety for further study.

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Area of Science:

Neuroscience
Behavioral Endocrinology
Animal Models

Background:

Activity-based anorexia (ABA) in rats involves increased physical activity, reduced food intake, and heightened hypothalamic-pituitary-adrenal (HPA) axis activity.
Understanding the long-term consequences of adolescent ABA on adult brain and behavior is crucial for modeling anxiety disorders.

Purpose of the Study:

To investigate whether adolescent experience with activity-based anorexia results in enduring changes in anxiety-like behavior and neuroendocrine function in adulthood.
To establish adolescent ABA as a model for studying the neural and behavioral correlates of prolonged anxiety.

Main Methods:

Female adolescent rats underwent activity-based anorexia or were food-restricted.
Adult rats were assessed for anxiety-like behavior using the elevated plus maze and open field tests.
Plasma corticosterone levels and corticotropin-releasing hormone (CRH) mRNA expression in the hypothalamus and amygdala were measured.

Main Results:

Rats exposed to adolescent ABA exhibited significantly increased anxiety-like behavior in adulthood compared to controls and food-restricted rats.
Adult rats with a history of adolescent ABA showed elevated plasma corticosterone and CRH mRNA expression in response to novelty.
These neuroendocrine changes were observed in the hypothalamic paraventricular nucleus and central amygdala.

Conclusions:

Adolescent activity-based anorexia induces persistent anxiety-like behavior and alters stress system reactivity in adulthood.
The adolescent ABA paradigm provides a valuable model for investigating the long-term effects of early-life stress and anxiety.
These findings highlight the critical impact of adolescent experiences on adult emotional regulation and stress responsivity.