The American Academy of Pediatrics (AAP), defined ADHD on its website (accessed on Sep. 12, 2007) under the section "Children's Health Topics":

“Attention-deficit/hyperactivity disorder (ADHD) is a condition of the brain that makes it hard for children to control their behavior. It is one of the most common chronic conditions of childhood. All children have behavior problems at times. Children with ADHD have frequent, severe problems that interfere with their ability to live normal lives.”

Sep. 12, 2007