The Brain Keeps Maturing Until the Mid-to-Late 20s

A teenager can look fully grown long before the brain has finished its work. The U.S. National Institute of Mental Health states that the brain finishes developing and maturing in the mid-to-late 20s. The part of the brain behind the forehead, called the prefrontal cortex, is one of the last parts to mature. The institute connects this to behavior. Ongoing development of the prefrontal cortex, together with the emphasis teens place on relationships with their peers, might lead them to take more risks, because the social benefits outweigh the possible consequences of a decision. An unfinished brain is also a flexible one. The institute describes the teen brain as ready to learn and adapt, and says that challenging classes, exercise and creative activities like art or music can strengthen brain circuits and help the brain mature.