Reviewed by Emily Henderson, B.Sc.Apr 21 2020 Attention-deficit/hyperactivity disorder (ADHD) is a highly prevalent neurodevelopmental disorder affecting between 8-10 percent of school-age children. In a recent study published in the Journal of Developmental & Behavioral Pediatrics, Stewart H. Mostofsky, M.D., director of the Center for Neurodevelopmental and Imaging Research at Kennedy Krieger Institute, and Karen