Regular marijuana users may have impaired brain reward centers

New research shows that regular marijuana users show impairments in the brain’s ability to respond to dopamine – a brain chemical that is involved in reward, among other functions.
Although this research can’t determine if regular marijuana use causes deficits in brain reward centers – or if users…

Source:: http://www.drugabuse.gov/news-events/news-releases/2014/07/regular-marijuana-users-may-have-impaired-brain-reward-centers