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Home / Health / Marijuana’s effects on young brains diminish 72 hours after use, research says

Marijuana’s effects on young brains diminish 72 hours after use, research says

By Mark Lieber

Marijuana is notorious for slowing certain cognitive functions such as learning, memory and attention span (maybe that’s why they call it “dope”?). But new research in young people suggests that these cognitive effects, while significant, may not persist for very long, even among chronic users.

The meta-analysis, published Wednesday in the journal JAMA Psychiatry, combines data from 69 previous studies that look at the effects of heavy cannabis use on cognitive functioning in adolescents and young adults. It found that those young people who identified as heavy marijuana users scored significantly lower than non-users in a variety of cognitive domains such as learning, abstraction, speed of processing, delayed memory, inhibition and attention.

“There have been a couple of meta-analyses done in adult samples, but this is the first one to be done specifically in adolescent and young adult samples,” said Cobb Scott, assistant professor of psychiatry at the Perelman School of Medicine at the University of Pennsylvania and a lead author of the study.

Read more at CNN

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