Visual body size estimation in adolescent anorexia nervosa: Behavioural and neurophysiological data suggest intact visual perception and biased emotional attention.

IF 5.8 1区 医学 Q1 PSYCHIATRY
Hugo Romero Frausto, Isabel Rahder, Anke W Dalhoff, Kati Roesmann, Georg Romer, Markus Junghöfer, Ida Wessing
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引用次数: 0

Abstract

Body image disturbance is a key symptom of anorexia nervosa (AN). AN patients report body dissatisfaction and overestimate their own body size in several tasks. This study aimed to clarify whether this overestimation arises from deficits in visual perception. To this end, 36 adolescent restrictive-type AN patients and 42 matched healthy controls performed metric and depictive body size estimation (BSE) tasks. Magneto- and electroencephalography were measured during the size estimation of 66 computer-generated body pictures varying in size from underweight to overweight. AN patients versus controls showed overestimation across self-referential metric and depictive BSE tasks, but similar performance in a depictive BSE task without self-reference and similar early neurophysiological responses. Starting mid-latency (200 ms), AN patients showed relatively more neural activity in response to underweight body pictures and less neural activity in response to higher-weight body pictures in distributed brain regions. A secondary comparison of AN patients with slight vs. distinct overestimation during self-referential BSE uncovered relatively stronger neural responses to body pictures corresponding to the estimated body mass index. These results suggest that body image disturbances in adolescent restrictive-type AN patients depend on self-reference and do not represent a deficit of visual perception, but rather biased emotional attention.

青少年厌食症患者的视觉体型估计:行为学和神经生理学数据表明,视觉感知和情感注意存在偏差。
身体形象障碍是神经性厌食症(AN)的一个主要症状。厌食症患者对自己的身体不满意,并在多项任务中高估了自己的体型。本研究旨在阐明这种高估是否源于视觉感知的缺陷。为此,36 名青少年限制型自闭症患者和 42 名匹配的健康对照者进行了度量和描述性体型估计(BSE)任务。在对计算机生成的 66 幅从体重不足到超重不等的人体图片进行体型估计时,对磁场和脑电图进行了测量。自闭症患者与对照组相比,在自我参照的度量和描绘性 BSE 任务中表现出高估,但在没有自我参照的描绘性 BSE 任务中表现相似,早期神经生理反应也相似。从中频(200 毫秒)开始,在分布式脑区,自闭症患者对体重不足的人体图片的神经活动相对较多,而对体重较高的人体图片的神经活动较少。对自我参照 BSE 中轻微高估与明显高估的 AN 患者进行二次比较,发现他们对与估计体重指数相对应的身体图片的神经反应相对较强。这些结果表明,青少年限制型自闭症患者的身体形象障碍取决于自我参照,并不代表视觉感知的缺陷,而是情绪注意力的偏差。
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来源期刊
CiteScore
11.50
自引率
2.90%
发文量
484
审稿时长
23 weeks
期刊介绍: Psychiatry has suffered tremendously by the limited translational pipeline. Nobel laureate Julius Axelrod''s discovery in 1961 of monoamine reuptake by pre-synaptic neurons still forms the basis of contemporary antidepressant treatment. There is a grievous gap between the explosion of knowledge in neuroscience and conceptually novel treatments for our patients. Translational Psychiatry bridges this gap by fostering and highlighting the pathway from discovery to clinical applications, healthcare and global health. We view translation broadly as the full spectrum of work that marks the pathway from discovery to global health, inclusive. The steps of translation that are within the scope of Translational Psychiatry include (i) fundamental discovery, (ii) bench to bedside, (iii) bedside to clinical applications (clinical trials), (iv) translation to policy and health care guidelines, (v) assessment of health policy and usage, and (vi) global health. All areas of medical research, including — but not restricted to — molecular biology, genetics, pharmacology, imaging and epidemiology are welcome as they contribute to enhance the field of translational psychiatry.
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