Brain Activation in Anorexia and Bulimia Nervosa
Author Information
Author(s): Brooks Samantha J., O′Daly Owen G., Uher Rudolf, Friederich Hans-Christoph, Giampietro Vincent, Brammer Michael, Williams Steven C. R., Schiöth Helgi B., Treasure Janet, Campbell Iain C.
Primary Institution: Department of Neuroscience, Uppsala University, Uppsala, Sweden
Hypothesis
Women with anorexia nervosa (AN) and bulimia nervosa (BN) will show different patterns of neural activation when thinking about eating food compared to healthy controls.
Conclusion
Women with AN and BN activate cognitive control regions in response to food images, but BN women show increased activation in reward and somatosensory areas, which may affect their control over eating.
Supporting Evidence
- Women with BN showed greater activation in reward regions compared to those with AN.
- Women with AN and BN both activated cognitive control regions in response to food images.
- Participants with BN had a higher BMI than those with AN.
- Women with BN reported significantly higher restraint scores on the EDE-Q than those with AN.
- Women with BPAN had significantly higher restraint scores than those with BN.
- Women with AN and BN had comparable anxiety and depression scores.
Takeaway
This study looked at how women's brains react to pictures of food. It found that women with bulimia have stronger reactions in parts of the brain that deal with rewards, which might make it harder for them to control their eating.
Methodology
The study used fMRI to compare brain activation in 50 women (8 with BN, 18 with AN, and 24 healthy controls) while they viewed food images.
Potential Biases
Potential bias due to the small number of participants and the specific demographics of the sample.
Limitations
The small sample size in the BN group limits the generalizability of the findings.
Participant Demographics
50 right-handed females aged 16-50, including 8 with bulimia nervosa, 18 with anorexia nervosa, and 24 healthy controls.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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