Institute of Psychology, Erasmus University Rotterdam, The Netherlands.
Appetite. 2009 Dec;53(3):376-83. doi: 10.1016/j.appet.2009.07.022. Epub 2009 Aug 6.
The main purpose of the present study was to investigate differences in the processing of food-related pictures between women with high and low scores on a scale of external eating. Electro-encephalographic brain activity was recorded, while participants were actively exposed to pictures of food items and control pictures. The amplitude of the P300 component of the even-related potentials was used as an index of motivation-related information processing. An enlarged P300 wave to food-related pictures was found in high external eaters as compared to low external eaters at several parieto-occipital electrode positions. No group differences in P300 amplitudes were found to neutral control pictures or pleasant, motivationally salient control pictures. It can be concluded that external eaters display an enhanced attentional processing of food-related information. The findings are discussed within an incentive sensitization model of overeating behavior.
本研究的主要目的是调查在外部进食量表得分高和得分低的女性中，对与食物相关的图片的处理差异。记录参与者在主动暴露于食物图片和控制图片时的脑电活动。事件相关电位的 P300 成分的幅度被用作与动机相关的信息处理的指标。与低外部进食者相比，高外部进食者在几个顶枕叶电极位置上，对与食物相关的图片的 P300 波幅增大。在中性控制图片或令人愉悦、动机显著的控制图片上，两组之间的 P300 幅度没有差异。可以得出结论，外部进食者对与食物相关的信息表现出增强的注意力处理。研究结果在暴食行为的激励敏感化模型中进行了讨论。
