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- W1750341761 endingPage "283" @default.
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- W1750341761 abstract "The prevalence of marijuana (MJ) use among youth and its legalization for medical or recreational use has intensified public health endeavors of understanding MJ effects on brain structure and function. Studies indicate that MJ use is related to impaired cognitive performance, and altered functional brain activation and chemistry in adolescents and adults, but MJ effects on brain morphology in emerging adults are less understood. Fifteen MJ users (age 21.8 ± 3.6, 2 females) and 15 non-user (NU) participants (age 22.3 ± 3.5, 2 females) were included, demographically matched on age, education and alcohol use. High-resolution structural MR images were acquired at 3 Tesla. Cortical thickness (CT) and volumetric analyses were performed using Freesurfer. A priori regions of interest (ROI) included orbitofrontal and cingulate cortices, amygdala, hippocampus and thalamus. Whole brain CT analysis did not result in significant group differences in a priori ROIs but revealed MJ users had significantly less CT (i.e., thinness) in right fusiform gyrus (rFG) compared to NU (p < 0.05). Thalamic volume was significantly smaller in MJ users compared to NU (right, p = 0.05; left, p = 0.01) and associated with greater non-planning (p < 0.01) and overall impulsivity (p = 0.04). There were no other group differences. RFG cortical thinness and smaller thalamic volume in emerging adults is associated with MJ abuse. Furthermore, smaller thalamic volume associated with greater impulsivity contributes to growing evidence that the thalamus is neurobiologically perturbed by MJ use. Collectively, altered thalamic and rFG structural integrity may interfere with their known roles in regulating visuoperceptual and object information processing." @default.
- W1750341761 created "2016-06-24" @default.
- W1750341761 creator A5021559378 @default.
- W1750341761 creator A5027461337 @default.
- W1750341761 creator A5048612918 @default.
- W1750341761 creator A5061642355 @default.
- W1750341761 creator A5075276141 @default.
- W1750341761 date "2015-10-01" @default.
- W1750341761 modified "2023-10-09" @default.
- W1750341761 title "Cortical thinness and volume differences associated with marijuana abuse in emerging adults" @default.
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