"disease of learning," as Harvard neurobiologist Steven Hyman has called it - that results in measurable changes to the brain. As such, young people learn to use and abuse drugs and alcohol, perhaps as a coping mechanism, and this results in fundamental brain changes that continue to affect them as they grow and develop. "Repeated drug use leads to long-lasting changes in the brain that undermine voluntary control," write the authors of a 2004 study in the journal Nature .
Addiction "is a form of pathologic learning," Maia Szalav..."
http://www.businessinsider.com/jay-z-video-war-drugs-science-addiction-2016-9
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