Knejzlíková Terézia, Světlák Miroslav, Malatincová Tatiana, Roman Robert, Chládek Jan, Najmanová Jana, Theiner Pavel, Linhartová Pavla, Kašpárek Tomáš
Department of Psychiatry, Faculty of Medicine, Masaryk University, Brno, Czechia.
Institute of Psychology and Psychosomatics, Faculty of Medicine, Masaryk University, Brno, Czechia.
Front Psychol. 2021 Sep 10;12:673597. doi: 10.3389/fpsyg.2021.673597. eCollection 2021.
Body image disturbances and the attendant negative emotions are two of the major clinical symptoms of eating disorders. The objective of the present experimental study was to shed more light on the degree of association or dissociation between the physiological and emotional response to mirror exposure in patients with restrictive mental anorexia, and on the relationships between the physiological response and characteristics connected with emotional processing. Thirty adolescent girls with the restrictive type of anorexia and thirty matched healthy controls underwent bilateral measurement of skin conductance (SC) during rest, neutral stimulus exposure, and mirror exposure, and completed a set of measures focused on emotion regulation competencies, affectivity, and eating disorder pathology. Compared to healthy controls, girls with restrictive anorexia rated mirror exposure as a subjectively more distressful experience. Differences in skin conductance response (SCR) were not significant; however, variance in SCR was substantially greater in the group of anorexia patients as compared to healthy controls. The overall skin conductance level (SCL) was lower in anorexia patients. Increase in SCR during mirror exposure, as opposed to exposure to neutral stimuli, was positively related to the tendency to experience negative emotions, interoceptive sensitivity, body dissatisfaction and suppression, but not to other symptoms of eating pathology or emotional awareness. A analysis suggested that physiological reactivity might be associated with interoceptive sensitivity to mirror exposure especially in anorectic patients. The study seems to demonstrate some degree of dissociation between psychophysiological reactivity and subjective response to body exposure in patients with restrictive anorexia. Factors affecting differences in psychophysiological responsiveness to body exposure in anorectic patients require further exploration.
身体形象障碍及随之而来的负面情绪是饮食失调的两大主要临床症状。本实验研究的目的是更深入地了解限制型精神性厌食症患者对镜子暴露的生理反应与情绪反应之间的关联或分离程度，以及生理反应与情绪加工相关特征之间的关系。30名患有限制型厌食症的青春期女孩和30名匹配的健康对照者在休息、中性刺激暴露和镜子暴露期间接受了双侧皮肤电导率（SC）测量，并完成了一系列针对情绪调节能力、情感和饮食失调病理学的测量。与健康对照者相比，患有限制型厌食症的女孩将镜子暴露视为一种主观上更痛苦的经历。皮肤电导率反应（SCR）的差异不显著；然而，与健康对照者相比，厌食症患者组的SCR方差显著更大。厌食症患者的总体皮肤电导率水平（SCL）较低。与暴露于中性刺激相比，镜子暴露期间SCR的增加与体验负面情绪的倾向、内感受敏感性、身体不满和压抑呈正相关，但与饮食病理学的其他症状或情绪意识无关。一项分析表明，生理反应性可能与对镜子暴露的内感受敏感性有关，尤其是在厌食症患者中。该研究似乎表明，限制型厌食症患者的心理生理反应性与对身体暴露的主观反应之间存在一定程度的分离。影响厌食症患者对身体暴露的心理生理反应差异的因素需要进一步探索。
