Department of Clinical Psychology and Psychotherapy, University of Tuebingen, Schleichstrasse 4, 72076 Tuebingen, Germany.
Department of Clinical Psychology and Psychotherapy, University of Regensburg, Universitaetsstrasse 31, 93053 Regensburg, Germany.
Nutrients. 2019 Jan 22;11(2):210. doi: 10.3390/nu11020210.
Loss of control eating (LOC) constitutes a common eating pathology in childhood and adolescence. Models developed for adult patients stress a biased processing of food-related stimuli as an important maintaining factor. To our knowledge, however, no EEG study to date investigated the processing of visual food stimuli in children or adolescents with LOC. Adolescents with at least one self-reported episode of LOC in the last four weeks and a matched control group completed a modified Go/NoGo task, with a numerical target or non-target stimulus being presented on one side of the screen and an irrelevant high-calorie food or neutral stimulus being presented on the opposite side. Mean P3 amplitudes were analyzed. In Go trials, the LOC group's mean P3 amplitudes were comparable irrespective of distractor category, while for NoGo trials, mean P3 amplitudes were significantly higher when the distractor was a high-calorie food stimulus. This pattern was reversed in the control group. Results are interpreted in light of Gray's reinforcement sensitivity theory. They might reflect altered processes of behavioral inhibition in adolescents with LOC upon confrontation with visual food stimuli.
失控性进食（LOC）是儿童和青少年中常见的一种进食障碍。为成年患者开发的模型强调了对与食物相关的刺激的偏见处理，这是一个重要的维持因素。然而，据我们所知，目前还没有脑电图研究调查 LOC 儿童或青少年对视觉食物刺激的处理。在过去四周内至少有一次自我报告的 LOC 发作的青少年和匹配的对照组完成了一项修改后的 Go/NoGo 任务，数字目标或非目标刺激呈现在屏幕的一侧，而无关的高热量食物或中性刺激呈现在另一侧。分析了平均 P3 幅度。在 Go 试验中，LOC 组的平均 P3 幅度与分心物类别无关，而在 NoGo 试验中，当分心物是高热量食物刺激时，平均 P3 幅度显著更高。对照组则相反。结果根据格雷的强化敏感理论进行了解释。它们可能反映了在面对视觉食物刺激时，LOC 青少年的行为抑制过程发生了改变。
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