Reality Damage –

Jan. 14, 2019,- “Most people would likely assume that one or two uses (joints) would have no impact, so we were curious to study this — and especially to investigate if first uses may actually produce brain changes that affect future behavior like subsequent use,” Hugh Garavan, lead author of the study and a professor of psychiatry at the University of Vermont School of Medicine, said in an email to NBC News. The study did not say what the increased brain matter volume means, but the researchers noted that the enlargement of gray matter contradicts normal adolescent development.

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