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Parietal lobe volume deficits in adolescents with schizophrenia and adolescents with cannabis use disorders.
MedLine Citation:
PMID:  22265363     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
OBJECTIVE: In early-onset schizophrenia (EOS), the earliest structural brain volumetric abnormalities appear in the parietal cortices. Early exposure to cannabis may represent an environmental risk factor for developing schizophrenia. This study characterized cerebral cortical gray matter structure in adolescents in regions of interest (ROIs) that have been implicated in EOS and cannabis use disorders (CUD).
METHOD: T1-weighted magnetic resonance images were acquired from adolescents with EOS (n = 35), CUD (n = 16), EOS + CUD (n = 13), and healthy controls (HC) (n = 51). Using FreeSurfer, brain volume was examined within frontal, temporal, parietal and subcortical ROIs by a 2 (EOS versus no EOS) × 2 (CUD versus no CUD) design using multivariate analysis of covariance. In ROIs in which volumetric differences were identified, additional analyses of cortical thickness and surface area were conducted.
RESULTS: A significant EOS-by-CUD interaction was observed. In the left superior parietal region, both "pure" EOS and "pure" CUD had smaller gray matter volumes that were associated with lower surface area compared with HC. A similar alteration was observed in the comorbid group compared with HC, but there was no additive volumetric deficit found in the comorbid group compared with the separate groups. In the left thalamus, the comorbid group had smaller gray matter volumes compared with the CUD and HC groups.
CONCLUSIONS: These preliminary data indicate that the presence of a CUD may moderate the relationship between EOS and cerebral cortical gray matter structure in the left superior parietal lobe. Future research will follow this cohort over adolescence to further examine the impact of cannabis use on neurodevelopment.
Authors:
Sanjiv Kumra; Paul Robinson; Rabindra Tambyraja; Daniel Jensen; Caroline Schimunek; Alaa Houri; Tiffany Reis; Kelvin Lim
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Publication Detail:
Type:  Journal Article     Date:  2011-12-14
Journal Detail:
Title:  Journal of the American Academy of Child and Adolescent Psychiatry     Volume:  51     ISSN:  1527-5418     ISO Abbreviation:  J Am Acad Child Adolesc Psychiatry     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-01-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8704565     Medline TA:  J Am Acad Child Adolesc Psychiatry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  171-80     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.
Affiliation:
University of Minnesota.
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