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Is body dysmorphic disorder associated with abnormal bodily self-awareness? A study using the rubber hand illusion.

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posted on 01.01.2014, 00:00 authored by R A Kaplan, Peter EnticottPeter Enticott, J Hohwy, D J Castle, S L Rossell
Evidence from past research suggests that behaviours and characteristics related to body dissatisfaction may be associated with greater instability of perceptual body image, possibly due to problems in the integration of body-related multisensory information. We investigated whether people with body dysmorphic disorder (BDD), a condition characterised by body image disturbances, demonstrated enhanced susceptibility to the rubber hand illusion (RHI), which arises as a result of multisensory integration processes when a rubber hand and the participant's hidden real hand are stimulated in synchrony. Overall, differences in RHI experience between the BDD group and healthy and schizophrenia control groups (n = 17 in each) were not significant. RHI strength, however, was positively associated with body dissatisfaction and related tendencies. For the healthy control group, proprioceptive drift towards the rubber hand was observed following synchronous but not asynchronous stimulation, a typical pattern when inducing the RHI. Similar drifts in proprioceptive awareness occurred for the BDD group irrespective of whether stimulation was synchronous or not. These results are discussed in terms of possible abnormalities in visual processing and multisensory integration among people with BDD.

History

Journal

PLoS One

Volume

9

Issue

6

Article number

e99981

Pagination

1 - 10

Publisher

Public Library of Science

Location

San Francisco, CA

eISSN

1932-6203

Language

English

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2014, Public Library of Science (PLOS)