The central nervous system is made up of your brain and spinal cord; this system helps control many activities in the body, like digestion and movement. When impaired by alcohol, the central nervous system has a harder time transporting messages from your brain to the rest of your body.
Adolescence has long been considered a period when teens are especially susceptible to engaging in unhealthy risk behaviors, such as drug and alcohol use, unprotected sex, and violence. However, “risk” is not confined to illegal or unsafe behaviors.
CNN's Dr. Sanjay Gupta says the brain is "rewired" when someone becomes addicted.