Kaplan Ryan A, Enticott Peter G, Hohwy Jakob, Castle David J, Rossell Susan L
School of Psychology and Psychiatry, Monash University, Melbourne, Australia; Monash Alfred Psychiatry Research Centre, The Alfred and Central Clinical School, Monash University, Melbourne, Australia.
Monash Alfred Psychiatry Research Centre, The Alfred and Central Clinical School, Monash University, Melbourne, Australia; Cognitive Neuroscience Unit, School of Psychology, Deakin University, Burwood, Australia.
PLoS One. 2014 Jun 12;9(6):e99981. doi: 10.1371/journal.pone.0099981. eCollection 2014.
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.
以往研究的证据表明，与身体不满相关的行为和特征可能与感知身体形象的更大不稳定性有关，这可能是由于身体相关多感官信息整合方面的问题。我们调查了患有身体变形障碍（BDD）的人——一种以身体形象障碍为特征的疾病——是否对橡皮手错觉（RHI）表现出更高的易感性，橡皮手错觉是当一只橡皮手和参与者隐藏的真实手同步受到刺激时，由多感官整合过程产生的。总体而言，BDD组与健康对照组和精神分裂症对照组（每组n = 17）之间在RHI体验上的差异并不显著。然而，RHI强度与身体不满及相关倾向呈正相关。对于健康对照组，在同步而非异步刺激后观察到本体感觉向橡皮手漂移，这是诱导RHI时的典型模式。BDD组无论刺激是否同步，本体感觉意识都会出现类似的漂移。我们从BDD患者视觉处理和多感官整合可能存在的异常方面对这些结果进行了讨论。
