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Electrophysiological evidence for an attentional bias in processing body stimuli in bulimia nervosa

  • Empirical evidence suggests abnormalities in the processing of body stimuli in bulimia nervosa (BN). This study investigated central markers of processing body stimuli by means of event-related potentials in BN. EEG was recorded from 20 women with BN and 20 matched healthy controls while watching and evaluating underweight, normal and overweight female body pictures. Bulimics evaluated underweight bodies as less unpleasant and overweight bodies as bigger and more arousing. A higher P2 to overweight stimuli occurred in BN only. In contrast to controls, no N2 increase to underweight bodies was observed in BN. P3 was modulated by stimulus category only in healthy controls; late slow waves to underweight bodies were more pronounced in both groups. P2 amplitudes to overweight stimuli were correlated with drive for thinness and body dissatisfaction. We present novel support for altered perceptual and cognitive-affective processing of body images in BN on the subjective and electrophysiological level. (C) 2015 Elsevier B.V. All rightsEmpirical evidence suggests abnormalities in the processing of body stimuli in bulimia nervosa (BN). This study investigated central markers of processing body stimuli by means of event-related potentials in BN. EEG was recorded from 20 women with BN and 20 matched healthy controls while watching and evaluating underweight, normal and overweight female body pictures. Bulimics evaluated underweight bodies as less unpleasant and overweight bodies as bigger and more arousing. A higher P2 to overweight stimuli occurred in BN only. In contrast to controls, no N2 increase to underweight bodies was observed in BN. P3 was modulated by stimulus category only in healthy controls; late slow waves to underweight bodies were more pronounced in both groups. P2 amplitudes to overweight stimuli were correlated with drive for thinness and body dissatisfaction. We present novel support for altered perceptual and cognitive-affective processing of body images in BN on the subjective and electrophysiological level. (C) 2015 Elsevier B.V. All rights reserved.show moreshow less

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Metadaten
Author:Sandra Mai, Klaus Gramann, Beate M. Herbert, Hans-Christoph Friederich, Petra WarschburgerORCiDGND, Olga Pollatos
DOI:https://doi.org/10.1016/j.biopsycho.2015.03.013
ISSN:0301-0511 (print)
ISSN:1873-6246 (online)
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=25813122
Parent Title (English):Biological psychology
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Year of first Publication:2015
Year of Completion:2015
Release Date:2017/03/27
Tag:Body image; Body stimuli; Bulimia nervosa; ERP; P2; Slow positive wave
Volume:108
Pagenumber:10
First Page:105
Last Page:114
Funder:local consultation units for eating disorders in Munich
Organizational units:Humanwissenschaftliche Fakultät / Institut für Psychologie
Peer Review:Referiert