Document Detail

The temporal sequence of magnetic brain activity for food categorization and memorization--an exploratory study.
MedLine Citation:
PMID:  20452435     Owner:  NLM     Status:  MEDLINE    
The importance of food stimuli for all living organisms is defined by their relevance for survival. Therefore, visual processing of food stimuli is influenced by many factors, such as cultural and societal background. In this magnetoencephalography (MEG) study, we examined the categorization and memorization of visual food and non-food stimuli in lean subjects, using a one-back working memory task. We found an increase in neural activity in several different regions of the brain elicited by food stimuli in comparison to non-food stimuli. The first observed significant difference was found in low-level visual areas as early as 120 ms after stimulus onset. The stimulus category of the previous picture did not influence this effect. However, preceding stimuli modulated behavioral measures (reaction time and accuracy of responses) and later components of the evoked responses around 350 ms. The evoked magnetic field of this late component showed a significant increase inactivity in the temporal cortex for food versus non-food objects. This late component exhibited a significant correlation with the reaction time. The difference of category-specific effects in the early components and the behavioral modulation of late components could be useful for further investigations of the cortical activity in response to food stimuli, e.g. in subjects with eating disorders or obesity.
Krunoslav T Stingl; Maja Rogić; Katarína Stingl; Carlos Canova; Otto Tschritter; Christoph Braun; Andreas Fritsche; Hubert Preissl
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-07
Journal Detail:
Title:  NeuroImage     Volume:  52     ISSN:  1095-9572     ISO Abbreviation:  Neuroimage     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-07-26     Completed Date:  2010-12-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9215515     Medline TA:  Neuroimage     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1584-91     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Inc. All rights reserved.
MEG-Center, University of Tübingen, Tübingen, Germany.
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MeSH Terms
Appetite / physiology*
Brain / physiopathology*
Feeding Behavior / physiology*
Magnetoencephalography / methods*
Thinness / physiopathology*

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