Dr. Russell Barkley calls it Executive Function Defecit Disorder (EFDD). He has videos on YouTube and books on his site.
ESPECIALLY, when people don’t understand that sometimes “hyperactivity” can be internal and not external. Little Timmy may be bouncing off the walls but Erica hasn’t had a quiet moment in her brain since birth. But she is quiet and smart and isn’t really a bother. Hmmm….