Testing associations between cannabis use and subcortical volumes in two large population-based samples.

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“Disentangling the putative impact of cannabis on brain morphology from other comorbid substance use is critical. After controlling for the effects of nicotine, alcohol and multi-substance use, this study aimed to determine whether frequent cannabis use is associated with significantly smaller subcortical grey matter volumes.

FINDINGS:

After correcting for multiple testing (p=0.007), cannabis use was unrelated to any subcortical ROI. However, maximum nicotine use was associated with significantly smaller thalamus volumes in middle-age males.

CONCLUSIONS:

In exploratory analyses based on young adult and middle age samples, normal variation in cannabis use is statistically unrelated to individual differences in brain morphology as measured by subcortical volume.”

https://www.ncbi.nlm.nih.gov/pubmed/29691937

https://onlinelibrary.wiley.com/doi/abs/10.1111/add.14252

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