Neural responses to food stimuli among individuals with eating and weight disorders: a systematic review of event-related potentials

• Published in: International review of psychiatry (Abingdon, England) Vol. 31; no. 4; pp. 318 - 331
• Main Authors: Chami, Rayane, Cardi, Valentina, Lautarescu, Alexandra, Mallorquí-Bagué, Nuria, McLoughlin, Grainne
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 19.05.2019; Taylor & Francis Ltd
• Subjects: attentional allocation; Attentional bias; Attentional Bias - physiology; Binge eating; Bulimia; Caloric intake; Craving; Craving - physiology; Cues; eating behaviour; Eating disorders; event-related potential; Event-related potentials; Evoked Potentials - physiology; Feeding and Eating Disorders - physiopathology; Feeding Behavior - physiology; Food; Healthy food; Humans; Hunger; Hunger - physiology; Inhibition, Psychological; inhibitory control; Inhibitory processes; Obesity; Overweight; Overweight - physiopathology; Systematic review; weight disorders; weight disorders; attentional allocation; eating behaviour; event-related potential; inhibitory control; Eating disorders
• ISSN: 0954-0261; 1369-1627
• DOI: 10.1080/09540261.2019.1622515

A systematic review was conducted to investigate event-related potentials (ERPs) in response to food and non-food stimuli among individuals with eating and weight disorders. Limiting the search to studies that have analysed ERPs relating to motivated attention and inhibitory control, 19 research papers were extracted from a systematic search in PubMed, Ovid, and Web of Science (2000-2018). An enhanced attentional bias towards food over non-food images (as indexed by P3(00) and LPP amplitudes) was evident for all populations. Individuals with binge eating disorder showed an enhanced attentional response to food cues compared to healthy controls. Inhibitory control-related ERP components (N2(00) and P3a) increased during food-specific no-go trials, but did not differentiate overweight from 'healthy' weight groups. The N2 amplitude to food pictures were positively correlated with caloric intake and food craving among individuals with obesity and binge eating disorder, respectively, while P3(00) was sensitive to hunger levels among overweight and obese females. The heterogeneity of stimuli/paradigms adopted, component timescales extracted, ERPs analysed, and data presented has challenged this review's ability to produce a robust synthesis of results. Some recommendations for future research are discussed.