Their brains work at a high rate and it puts the brain on an additional task to slow their processing rate as not to cause a jam up in the firing of the neurons

Their brains work at a high rate and it puts the brain on an additional task to slow their processing rate as not to cause a jam up in the firing of the neurons. They would shake their hands (and some do tap) but they use them for writing. This is not a joke, this is why some of them do this.