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• W1985552279 abstract "There are limited data regarding the impact of marijuana (MJ) on cortical development during adolescence. Adolescence is a period of substantial brain maturation and cortical thickness abnormalities may be indicative of disruptions of normal cortical development. This investigation applied cortical-surface based techniques to compare cortical thickness measures in MJ using adolescents compared to non-using controls. Eighteen adolescents with heavy MJ use and 18 non-using controls similar in age received MRI scans using a 3T Siemens scanner. Cortical reconstruction and volumetric segmentation was performed with FreeSurfer. Group differences in cortical thickness were assessed using statistical difference maps covarying for age and gender. Compared to non-users, MJ users had decreased cortical thickness in right caudal middle frontal, bilateral insula and bilateral superior frontal cortices. Marijuana users had increased cortical thickness in the bilateral lingual, right superior temporal, right inferior parietal and left paracentral regions. In the MJ users, negative correlations were found between frontal and lingual regions for urinary cannabinoid levels and between age of onset of use and the right superior frontal gyrus. This is one of the first studies to evaluate cortical thickness in a group of adolescents with heavy MJ use compared to non-users. Our findings are consistent with prior studies that documented abnormalities in prefrontal and insular regions. Our results suggest that age of regular use may be associated with altered prefrontal cortical gray matter development in adolescents. Furthermore, reduced insular cortical thickness may be a biological marker for increased risk of substance dependence." @default.
• W1985552279 created "2016-06-24" @default.
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• W1985552279 date "2011-06-01" @default.
• W1985552279 modified "2023-10-18" @default.
• W1985552279 title "Altered prefrontal and insular cortical thickness in adolescent marijuana users" @default.
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• W1985552279 doi "https://doi.org/10.1016/j.bbr.2011.02.001" @default.
• W1985552279 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3073407" @default.
• W1985552279 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21310189" @default.

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