marijuana smokers

(Photo by Christopher Furlong/Getty Images)

Study Finds Signs of Brain Changes in Pot Smokers

A small study of casual marijuana smokers has turned up evidence of changes in the brain, a possible sign of trouble ahead, researchers say.

04/15/2014

A new study finds that longtime marijuana use lowers motivation and reward-seeking behavior as the brain produces less dopamine. (Photo by Christopher Furlong/Getty Images)

Study: Longtime Marijuana Smokers Lack Motivation, Reward-Seeking Behavior

A new study finds that longtime marijuana use lowers motivation and reward-seeking behavior as the brain produces less dopamine.

07/04/2013

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