Department of Movement Science, Institute of Sport and Exercise Sciences, University of Münster, Münster, Germany; Otto Creutzfeldt Center for Cognitive and Behavioral Neuroscience, University of Münster, Münster, Germany.
Department of Experimental Psychology, Faculty of Social and Behavioral Sciences, University Utrecht, Utrecht, Netherlands.
Psychiatry Res. 2018 Sep;267:446-454. doi: 10.1016/j.psychres.2018.06.007. Epub 2018 Jun 20.
Body image disturbance is a key symptom of Anorexia Nervosa (AN). Previous studies found that women with AN overestimate their body size in comparison with healthy controls (HC), at least for unimodal measures involving either only visual input (e.g. distorted photographs technique) or only tactile input (e.g. tactile distance tasks). Distorted body representations are hypothesized to cause this misperception in AN. We here tested whether this overestimation remains present in a novel one-point-localization (OPL) task involving the mapping of a tactile stimulus onto a visual image. Two experiments compared the ability of 27 women with AN and 40 HC to accurately localize a tactile stimulus on a live image of their body. Women with AN and HC did not differ in their performance. Instead, participants in both groups showed systematic distortions in their localization performance. This study suggests that the mapping of a tactile stimulus does not involve a distorted body representation in women with AN compared to HC.
体像障碍是神经性厌食症 (AN) 的一个关键症状。先前的研究发现，与健康对照组 (HC) 相比，患有 AN 的女性至少在涉及单一感觉输入的单峰测量中（例如失真照片技术）或仅涉及触觉输入的单峰测量中（例如触觉距离任务）高估了自己的体型。假设失真的身体表象导致了 AN 中的这种错觉。我们在这里测试了这种高估是否仍然存在于涉及将触觉刺激映射到视觉图像的新型单点定位 (OPL) 任务中。两个实验比较了 27 名 AN 女性和 40 名 HC 女性准确定位其活体身体图像上触觉刺激的能力。患有 AN 和 HC 的女性在表现上没有差异。相反，两组参与者在定位表现上都表现出系统的扭曲。这项研究表明，与 HC 相比，AN 女性在将触觉刺激映射到身体的实时图像时，并不涉及失真的身体表象。
