Back to Previous Page Impact of Marijuana on Adolescent Brain Posted March 3, 2014 by JoAnn Groh & filed under Downtown News, News. This was broadcast on NPR this morning. We found it so compelling we wanted to share it with our parents in addition to discussing it in Advisories. NPR: Marijuana May Hurt The Developing Teen Brain Leave a Reply Click here to cancel reply. Name (required) Mail (required) (will not be published) Website XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> ΔSign me up for the newsletter!