gkekoa
Well-Known Member
Again, those only discuss development.
Among adults, it has been proven to have no long term effect on mental ability.
Am. J. Epid.
Here are a couple of excerpts dealing with long-term brain effects and they are in adults.
"Although imaging studies (functional MRI; fMRI) in chronic users do show some consistent alterations, the relation of these changes to cognitive functioning is less clear."
"Long-term marijuana use may actually shrink certain parts of the brain and have lasting effects on mental health."
"Researchers found that the hippocampus, which is thought to regulate memory, was an average of 12% smaller among marijuana users, compared with people who didn't smoke pot. The amygdala, involved in emotion and memory, was an average of 7% smaller."