Experimental mice have been telling us this for years, but pot-smoking humans didnt want to believe it could happen to them: Compared with a person who never smoked marijuana, someone who uses marijuana regularly has, on average, less gray matter in his orbital frontal cortex, a region that is a key node in the brains reward, motivation, decision-making and addictive behaviors network. More ambiguously, in regular pot smokers, that region is better connected than it is in non-users: the flow of signal traffic is speedier to other parts of that motivation and decision-making network, including across the superhighway of white matter that connects the brains hemispheres.
Posted on: Sat, 15 Nov 2014 03:57:07 +0000