Category: cognition

Study: Adolescent Cannabis Exposure Not Associated With Structural Brain Differences in Adulthood

The use of cannabis during adolescence is not associated with structural brain differences in adulthood, according to longitudinal data published in the journal Drug and Alcohol Dependence. Researchers concluded, concluded, “[T]he patterns of cannabis use typically seen in community-dwelling adolescents does not appear to have lasting effects on brain structure.”

Yet Another Study Finds That Cannabis Use Is Not Independently Linked With IQ Decline

Cannabis use by teens is not independently linked with adverse changes in intelligence quotient or executive functioning, according to longitudinal data published online ahead of print in the journal Addiction. Investigators concluded, “Short-term cannabis use in adolescence does not appear to cause IQ decline or impair executive functions, even when cannabis use reaches the level of dependence.”

Study: Marijuana Use Not Associated With Previously Reported Changes In Brain Morphology

It was less than a year ago when the mainstream media was chock-full of headlines like this one: ‘Brain changes associated with casual marijuana use in young adults, study finds.’
But a funny thing happened when a team of scientists from the University of Colorado and the University of Kentucky tried to replicate these results in a separate, larger sample (158 participants) of subjects after rigorously controlling for both groups’ use of alcohol. They couldn’t.

Study: Cannabis Use Associated With Lower Mortality Risk In Patients With Psychotic Disorders

[Editor’s note: This post is excerpted from this week’s forthcoming NORML weekly media advisory. To have NORML’s news alerts and legislative advisories delivered straight to your in-box, sign up here.] The use of cannabis is associated with lower mortality risk in patients with schizophrenia and related psychotic disorders, according to a forthcoming study to be published in the Journal of Psychiatric Research. (Read the abstract of the study online here.) An international team of investigators from the University of Maryland School of Medicine and Inje University in South Korea assessed […]