ADHD - attention deficit and hyperactivity
Symptoms of ADHD appear before the age of 7 yr, and most of them persist lifelong.
ADHDers often have high IQ. Their brains work like a spinning wheel; New ideas flash constantly (and also randomly); Quantum 'leap' (transition) features their thinking; Seemingly bizarre treads pop-up from time to time...
It is believed the A. Einstein is one. Who else do you imagine?