Document Detail


Regional gray matter abnormalities in obsessive-compulsive disorder: a voxel-based morphometry study.
MedLine Citation:
PMID:  15978549     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Several structural magnetic resonance imaging (MRI) studies have investigated the presence of brain abnormalities in obsessive-compulsive disorder (OCD) but have not produced consistent findings. This might be partly related to their use of a regions-of-interest approach. We assessed gray matter volumes in 19 OCD subjects and 15 healthy volunteers, using voxel-based morphometry (VBM). METHODS: Images were acquired with a 1.5-T MRI scanner, spatially normalized, and segmented with optimized VBM. Statistical comparisons were performed with the general linear model. RESULTS: Significant findings were detected in regions predicted a priori to be implicated in OCD, including increased gray matter in OCD subjects relative to control subjects in posterior orbitofrontal and parahippocampal regions; decreased gray matter in OCD patients in the left anterior cingulate cortex; and inverse correlations between obsessive-compulsive symptom severity and gray matter in the medial thalamus (p < .001, uncorrected for multiple comparisons). Also, an unpredicted site of gray matter reduction in OCD patients in the right parietal associative cortex approached significance (p = .052, corrected for multiple comparisons). CONCLUSIONS: Our findings are consistent with previous studies implicating dysfunction of orbitofrontal, cingulate, thalamic, and temporolimbic regions in OCD and suggest that the involvement of the parietal cortex in the pathophysiology of OCD warrants further investigation.
Authors:
Antonio A Valente; Euripedes C Miguel; Claudio C Castro; Edson Amaro; Fabio L S Duran; Carlos A Buchpiguel; Xavier Chitnis; Philip K McGuire; Geraldo F Busatto
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-06-22
Journal Detail:
Title:  Biological psychiatry     Volume:  58     ISSN:  0006-3223     ISO Abbreviation:  Biol. Psychiatry     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-10-03     Completed Date:  2005-12-07     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0213264     Medline TA:  Biol Psychiatry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  479-87     Citation Subset:  IM    
Affiliation:
Department of Psychiatry, Faculty of Medicine, University of São Paulo, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Adult
Brain / pathology*
Brain Mapping
Female
Humans
Image Processing, Computer-Assisted / methods
Magnetic Resonance Imaging / methods
Male
Middle Aged
Obsessive-Compulsive Disorder / pathology*
Statistics as Topic

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