zonk

I ******d as well ...came up with similiar results as angel bear
but it may be quite simple-

"hyper" means excessive as in "hyperactivity"
"motor" could well refer to the bodies motor skills, ie movement
put the two together and you get excessive body movement.
which you would obviously see in a seizure.
but perhaps it is just refering to excessive body movement such as pacing or similiar seen with dementia sufferers.
I will ask my daughter tonight as she is studying behavioural neuroscience
(clever girl!)
kind regards,
jo