Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder which consists of symptoms of inattention and hyperactivity-impulsivity.
Athyglisbrests- og ofvirkniröskun (ADHD) er taugaþroskaröskun sem samanstendur af einkennum athyglisbrests og/eða ofvirkni og hvatvísi.