I do not think it is new, but was an unnamed disorder until recently.
People who suffered from this were called “different” or “odd”.
I have an uncle and a nephew with symptoms similar to my son. All 3 are 2nd child, and male.
Regards,
Texas Fossil
Maybe. I think it’s “odd” to expect every human being to develop in exactly the same way as any other. The boy who used to get up in the middle of the night to jump on the trampoline was definitely hyperactive, but now that he runs marathons and plays drums a couple of hours a day, it’s less disruptive. A high level of energy and activity is generally a positive thing in life - just not in a classroom.