NIDA Study Finds Underage Cannabis Use Alters Brain Connectivity

WASHINGTON – Cannabis consumers who start using marijuana in their teens may be altering the hardwire hubs that route signals within the brain. When it comes to cognitive tasks like working memory and inhibitory control, though, regular cannabis consumers test just the same as non-consumers.

Those are some of the findings of a new study conducted by Peter Manza, Dardo Tomasi, and Nora Volkow of the National Institute on Drug Abuse (NIDA). Volkow is the longtime director of NIDA.

Manza presented the study earlier this month at the Society for Neuroscience’s annual meeting in Washington, D.C. The full study has yet to be published, but Manza spoke about the results and presented an abstract at the conference.

Data from the Connectome Project

Drawing from 441 participants in the Human Connectome Project, the researchers compared 30 regular cannabis consumers, ages 22-35, with a control group of 30 non-consumers of

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