Document Detail

Sensitivity to reward: implications for overeating and overweight.
MedLine Citation:
PMID:  15010176     Owner:  NLM     Status:  MEDLINE    
Sensitivity to reward (STR)-a personality trait firmly rooted in the neurobiology of the mesolimbic dopamine system-has been strongly implicated in the risk for addiction. This construct describes the ability to derive pleasure or reward from natural reinforcers like food, and from pharmacologic rewards like addictive drugs. Recently experts in the field of addiction research have acknowledged that psychomotor stimulant drugs are no longer at the heart of all addictions, and that brain circuits can also be deranged with natural rewards like food. The present study tested a model in which STR was expected to relate positively to overeating, which in turn would be associated with higher body weight in woman aged 25-45 years. As predicted, STR was correlated positively with measures of emotional overeating. Also, overweight woman were significantly more sensitive to reward than those of normal weight. Interestingly, however, the obese woman (Body Mass Index>30) were more anhedonic than the overweight woman (Body Mass Index>25<30). These findings are discussed in the context of neuroadaptations to overactivity of brain reward circuits. Results also indicate that STR may serve as a risk factor for overeating and overweight, especially in cultures such as ours where palatable, calorically-dense food is plentiful.
Caroline Davis; Shaelyn Strachan; Marni Berkson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Appetite     Volume:  42     ISSN:  0195-6663     ISO Abbreviation:  Appetite     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-03-10     Completed Date:  2004-05-11     Revised Date:  2014-03-25    
Medline Journal Info:
Nlm Unique ID:  8006808     Medline TA:  Appetite     Country:  England    
Other Details:
Languages:  eng     Pagination:  131-8     Citation Subset:  IM    
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MeSH Terms
Body Mass Index
Brain / physiology*
Energy Intake / physiology*
Middle Aged
Obesity / etiology,  physiopathology*,  psychology
Self Stimulation

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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