ADHD

Attention-deficit-hyperactivity disorder shares the core group of symptoms -- impulsivity, inattention, and motor restlessness.... The disorder is extremely common, affecting approximately 4 percent of all children, although estimates vary widely, from 3 to 11 percent or more. The cause of ADHD remains unknown. Alan J. Zametkin, Monique Ernst in The New England Journal of Medicine

(back)