ADHD (Attention Deficit Hyperactive Disorder)
As the H word implies it is noted by Hyperactivity, if that can be defined.
But the notion of any attention deficit would seem to play on the notion that a certain amount of attention is either a necessity for expected function or a subsequent change in expected function following and therefore associated with a drop in attention. How a person deals with that is where the notion that the subsequent actions of the person is deemed hyperactive and a disorder to the environment the activity occurs in