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A volunteer holds a dried cannabis bud at the La Brea Collective medical marijua

Study: Casual pot use causes brain abnormalities in the young

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(Reuters) - Young, casual marijuana smokers experience potentially harmful changes to their brains, with the drug altering regions of the mind related to motivation and emotion, researchers found.

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The study to be published on Wednesday in the Journal of Neuroscience differs from many other pot-related research projects that are focused on chronic, heavy users of cannabis.

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