By Steve Elliott
It's a repeating pattern. Last year, the mainstream press gave lots of attention to a study suggesting that daily marijuana use could cause abnormalities in the brain. But now that new research, using better techniques, indicates that claim simply isn't true, it doesn't get nearly as much coverage.
The authors of the new study, "Daily Marijuana Use Is Not Associated with Brain Morphometric Measures in Adolescents or Adults," which was published in the latest issue of the Journal of Neuroscience, suggest that alcohol use was actually responsible for the brain changes found in previous studies, reports Ray Stern at Phoenix New Times.
An abstract of the study describes how scientists could not replicate recent research that claimed cannabis use "is associated with volumetric and shape differences in subcortical structures."
The MRI brain-scan reports of 29 adults and 50 adolescents who use cannabis daily were compared with MRI scans of the same numbers of adult and teen non-users of cannabis.