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Effects of laparoscopic sleeve gastrectomy on attentional processing of food-related information: evidence from eye-tracking.
MedLine Citation:
PMID:  24355326     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Weight loss after laparoscopic sleeve gastrectomy (LSG) might be associated partially with changes in reward system functioning and altered appetitive responses to food cues. Food cue processing refers to motivational, affective, and cognitive responses to stimuli that are associated with food. We investigated if food cue processing is altered 6 months after weight loss that is induced by LSG. We expected patients after LSG to show reduced appetitive responses to food cues.
METHODS: In an experimental longitudinal exploratory study, 17 severely obese patients (body mass index [BMI]: 48.3±6.5 kg/m²) were investigated presurgery and 6 months postsurgery. We used eye-tracking to assess attentional biases during free viewing of food versus nonfood cues, assessed pleasantness ratings of food cues, and self-reported food craving.
RESULTS: After LSG, the mean BMI of patients was 36.4±6.0 kg/m², and the percentage of excess weight loss (%EWL) was 46.6%±14.0%. Six months after LSG, patients showed an attentional bias toward nonfood cues compared with presurgery, reported lower food craving, and rated presented food stimuli as less pleasant.
CONCLUSION: Evidence of altered food cue processing was found in patients after LSG, which may be interpreted as reduced food reward associated with increased cognitive control. Surgery-induced physiologic, cognitive-motivational, and behavioral changes may lead to a desensitization of the reward system and enhanced cognitive control.
Authors:
Katrin E Giel; Nicole Rieber; Paul Enck; Hans-Christoph Friederich; Tobias Meile; Stephan Zipfel; Martin Teufel
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-9-23
Journal Detail:
Title:  Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery     Volume:  -     ISSN:  1878-7533     ISO Abbreviation:  Surg Obes Relat Dis     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-12-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101233161     Medline TA:  Surg Obes Relat Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 American Society for Bariatric Surgery Published by American Society for Metabolic and Bariatric Surgery All rights reserved.
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