Brain of Marijuana User (IMAGE) Children's Hospital of Philadelphia Caption Yellow areas in the brain of a heavy marijuana smoker show brain regions with the most significant abnormalities. These areas correspond with those under development during normal adolescent years. Credit The Children's Hospital of Philadelphia Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.