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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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Deanna puttonen university of british columbia research paper by uher et al l.jpg

Deanna Puttonen

University of British Columbia

Research Paper by Uher et al.

Body Shape Perception in Healthy and Eating-Disordered Women


Background l.jpg
Background

  • Dissatisfaction with body shape and size is the rule, not the exception

  • Eating disorders:

    • Anorexia

    • Bulimia

    • Distorted body perceptions


Brain systems l.jpg
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)


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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


Method l.jpg
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


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Scan Results

  • Lower EBA activation

  • Less parietal activity



Limitations of the study l.jpg
Limitations of the Study

  • Line drawings not evocative

  • Variance in subjects

  • Chronic nature of subjects limits generalizability

  • Comorbidity


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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


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Future Research

  • Prescreen for severe body-image disturbance

  • Naturalistic images

  • Causational studies


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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.



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