Behavioral Sciences Institute, Seville, Spain.
Neuropsychiatr Dis Treat. 2012;8:1-11. doi: 10.2147/NDT.S27302. Epub 2011 Dec 28.
Clinical applications of electroencephalography (EEG) are used with different objectives, EEG being a noninvasive and painless procedure. In respect of eating disorders, in the 1950s a new line of study about the neurological bases of anorexia nervosa was started and has since been developed. The purpose of this review is to update the existing literature data on the main findings in respect of EEG in eating disorders by means of a search conducted in PubMed. Despite the fact that weight gain tends to normalize some brain dysfunctions assessed by means of EEG, the specific effect of gaining weight remains controversial. Different studies have reported that cortical dysfunctions can be found in patients with anorexia nervosa even after weight gain, whereas others have reported a normalization of EEG in respect of the initial reduced alpha/ increased beta power in those patients with refeeding. Findings of studies that have analyzed the possible relationship between eating disorders and depression, based on sleep EEG disturbances, do not support the idea of eating disorders as a variant of depression or affective disorders. Some EEG findings are very consistent with previous neuroimaging results on patients with anorexia nervosa, reporting neural disturbances in response to stimuli that are relevant to the pathology (eg, stimuli like food exposure, different emotional situations, or body images).
临床应用脑电图（EEG）用于不同的目的，EEG 是一种非侵入性和无痛的程序。在饮食失调方面，在 20 世纪 50 年代，开始了一项关于神经性厌食症的神经基础的新研究，并自此得到了发展。本综述的目的是通过在 PubMed 中进行搜索，更新关于脑电图在饮食失调中的主要发现的现有文献数据。尽管体重增加往往会使通过 EEG 评估的一些大脑功能障碍正常化，但增重的具体效果仍存在争议。不同的研究报告称，即使在体重增加后，神经性厌食症患者也可能存在皮质功能障碍，而另一些研究则报告称，那些重新进食的患者的脑电图最初的阿尔法减少/贝塔增加功率会恢复正常。基于睡眠脑电图紊乱分析饮食失调与抑郁症之间可能关系的研究结果并不能支持将饮食失调视为抑郁症或情感障碍的一种变体的观点。一些脑电图发现与神经性厌食症患者的先前神经影像学结果非常一致，报告了对与病理学相关的刺激（例如，食物暴露、不同的情绪情况或身体形象等刺激）的神经反应紊乱。
