Electrocortical Processing of Food and Emotional Pictures in Anorexia Nervosa and Bulimia Nervosa
Electrocortical Processing of Food and Emotional Pictures in Anorexia Nervosa and Bulimia Nervosa
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DOI：
10.1097/psy.0b013e318211b871
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发表时间：
2011-06-01
影响因子：
3.3
通讯作者：
Tuschen-Caffier, Brunna
中科院分区：
文献类型：
--
作者：
Blechert, Jens;Feige, Bernd;Tuschen-Caffier, Brunna
Objective: To compare the electrocortical processing of food pictures in participants with anorexia nervosa (n = 21), bulimia nervosa (n = 22), and healthy controls (HCs)(n = 32) by measuring the early posterior negativity, an event-related potential that reflects stimulus salience and selective attention. Methods: We exposed these three groups to a rapid stream of high- and low-calorie food pictures, as well as standard emotional and neutral pictures. Results: Event-related potentials in the time range of 220 milliseconds to 310 milliseconds on posterior electrodes differed between groups: patients with eating disorders showed facilitated processing of both high- and low-calorie food pictures relative to neutral pictures, whereas HC participants did so only for the high-calorie pictures. Subjective palatability of the pictures was rated highest by patients with anorexia nervosa, followed by the HC and bulimia nervosa groups. Conclusions: Patients with eating disorders show a generalized attentional bias for food images, regardless of caloric value. This might explain the persistent preoccupation with food in these individuals.
