Attention-Deficit Hyperactivity Disorder (ADHD), is a neurobehavioral developmental disorder affecting about 3-5% of the world's population under the age of 19. It typically presents itself during childhood, and is characterized by a persistent pattern of inattention and/or hyperactivity, as well as forgetfulness, poor impulse control or impulsivity, and distractibility.

References

^ NINDS Attention Deficit-Hyperactivity Disorder Information Page. National Institute of Neurological Disorders and Stroke (NINDS/NIH) February 9, 2007. Retrieved on 2007-08-13. ^ Psychiatric Association|the American Psychiatric Association, Fourth Edition, htm Attention-Deficit/Hyperactivity Disorder (ADHD).] Behavenet.com. Retrieved on December 11, 2006.