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Body Shape Perception in Healthy and Eating-Disordered Women

Deanna Puttonen University of British Columbia Research Paper by Uher et al. Body Shape Perception in Healthy and Eating-Disordered Women. Background. Dissatisfaction with body shape and size is the rule, not the exception Eating disorders: Anorexia Bulimia Distorted body perceptions.

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Body Shape Perception in Healthy and Eating-Disordered Women

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  1. Deanna Puttonen University of British Columbia Research Paper by Uher et al. Body Shape Perception in Healthy and Eating-Disordered Women

  2. Background • Dissatisfaction with body shape and size is the rule, not the exception • Eating disorders: • Anorexia • Bulimia • Distorted body perceptions

  3. Brain Systems • Extrastriate body area (EBA) • Lateral occipitotemporal cortex • Responds to images of the body • Body schema • Mental map of one’s own body • Right parietal cortex and thalamus • Area may be overactive with eating disorders (Wagner et al, 2003)

  4. Hypotheses 1. EBA and body schema differentially activated 2. Patients have greater aversion and therefore more activity in the emotion processing regions: • Medial prefrontal cortex • Amygdala • Insula

  5. Method • 22 patients and 18 control • In scanner: • Images of underweight, normal and overweight bodies and house for control • Think of acceptability • After: • Rated images for disgust and fear

  6. Scan Results • Lower EBA activation • Less parietal activity

  7. Aversion Results

  8. Limitations of the Study • Line drawings not evocative • Variance in subjects • Chronic nature of subjects limits generalizability • Comorbidity

  9. Conclusion Hypotheses: • EBA and body schema differentially activated REJECT Ho 2) Patients have greater aversion and therefore more activity in the emotion processing regions FAIL TO REJECT Ho

  10. Future Research • Prescreen for severe body-image disturbance • Naturalistic images • Causational studies

  11. References Uher, R., Murphy, T., Friederich, H., Dalgleish, T., Brammer, M., Giampietro, V., Phillips, M., Andrew, C., Ng, V., Williams, S., Campbell, I., & Treasure, J. (2005). Functional neuroanatomy of body shape perception in healthy and eating-disordered women. Biological Psychiatry, 58, 990-997. Wagner, A., Ruf, M., Braus, D.F., Schmidt, M.H. (2003). Neuronal activity changes and body image distortion in anorexia nervosa. Neuroreport, 14, 2193-2197.

  12. Questions?

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