Category: Eating Disorders

Symposium

Neural Correlates of Acute Stress and Excessive Exercise in the Daily Life of Women With Bulimia Nervosa

Saturday, November 18
12:00 PM - 1:30 PM
Location: Cobalt 502, Level 5, Cobalt Level

Keywords: Eating Disorders | Ecological Momentary Assessment | fMRI (Function Magnetic Resonance Imaging)
Presentation Type: Symposium

Bulimia nervosa (BN) is characterized by two core symptoms: binge eating (BE) and compensatory behaviors to prevent weight gain. While BE and purging have been researched extensively, other compensatory behaviors, such as excessive exercise (EE), have not. The current study integrates two different types of methodology, neuroimaging and ecological momentary assessment (EMA), to achieve several goals related to the study of EE in women with BN. First, we examined the relationship of stress to EE in daily life. Second, we examined the neural correlates of an acute stress response in women with BN. The final goal was to examine how the neural correlates of acute stress in women with BN moderate the trajectory of acute stress to EE. Seventeen women with BN symptoms completed a modified Trier Social Stress Task while in the scanner. Subjective stress was rated throughout the paradigm. Participants responded to a series of prompts assessing daily ratings of emotions, stress, and EE for a period of 2 weeks. An examination of days with self-reported stress and EE suggested that there were no significant increases or decreases of stress prior to or after EE. Significant decreases in limbic and prefrontal cortex regions during the acute period of stress were observed. In addition, several limbic regions significantly moderated the trajectory of stress prior to EE episodes. Our study provides information about the role of EE and stress in BN. Our analysis suggests that EE may not function in the same way as other compensatory behaviors

Lauren Breithaupt

George Mason University

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Neural Correlates of Acute Stress and Excessive Exercise in the Daily Life of Women With Bulimia Nervosa



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