Brain and Behavior - Executive Functions of the Frontal Lobe

I see too many young people who have overused substances have limited and impaired brain function. Many are overly self confident, that they will be successful no matter what. They also cannot finish/complete some of their academic studies, for various reasons. It is so sad to see a one time honour student, barely be able to pass an exam. I am not educated about the brain, but I thought this would interest some of my readers.