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Medial prefrontal cortex activity associated with symptom provocation in eating disorders
Rudolf Uher1, Tara Murphy, Michael J Brammer
1Institute of Psychiatry PO59, Eating Disorders Unit, King's College London, De Crespigny Park, London SE5 8AF, UK. r.uher@iop.kcl.ac.uk
The American Journal of Psychiatry
|July 2, 2004
Summary
Neural correlates of eating disorders reveal shared brain patterns in anorexia nervosa and bulimia nervosa. Abnormal medial prefrontal cortex activation to symptom-related stimuli suggests a transdiagnostic neural basis for these conditions.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Eating disorders (EDs) lack clear endophenotypes for genetic research.
- Understanding neural correlates is crucial for ED classification and genesis debates.
Purpose of the Study:
- Identify neural correlates of eating disorders.
- Provide endophenotypes for genetic research.
- Contribute to ED genesis and classification discussions.
Main Methods:
- Functional magnetic resonance imaging (fMRI) in 26 female patients with EDs (10 bulimia nervosa, 16 anorexia nervosa) and 19 healthy controls.
- Stimuli included food and aversive emotional images.
- Brain activity recorded during stimulus presentation.
Main Results:
- Women with EDs perceived food stimuli as threatening and disgusting.
- Greater activation in medial orbitofrontal and anterior cingulate cortices in ED group.
- Reduced activation in lateral prefrontal cortex, inferior parietal lobule, and cerebellum in ED group.
- Bulimia nervosa subgroup showed less prefrontal cortex activation.
Conclusions:
- Medial prefrontal cortex response to symptom-provoking stimuli is a common feature of anorexia nervosa and bulimia nervosa.
- This supports a transdiagnostic neural conceptualization of EDs.
- Abnormal medial prefrontal circuit activation may underlie compulsive behaviors in EDs, OCD, and addictive disorders.