adhd

Attention-deficit hyperactivity disorder (ADHD) is a mental disorder of the neurodevelopmental type.[9][10] It is characterized by problems paying attention, excessive activity, or difficulty controlling behavior which is not appropriate for a person's age.[1][2] The symptoms appear before a person is twelve years old, are present for more than six months, and cause problems in at least two settings (such as school, home, or recreational activities).[3][11] In children, problems paying attention may result in poor school performance.[1] Although it causes impairment, particularly in modern society, many children with ADHD have a good attention span for tasks they find interesting.[12]

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