it depends what is actually happening... if i sleep on my arms by accident i wake up in the morning and can move them at all, just have to giggle around to get blood flowing again LOL
but the numbness iv been getting in my fingers i can still move them perfectly, just numb and tingly.
just got home from squatting, if i wake up with tingly fingers i know its either the way i wrap that wrist (was mindful of where all the pressure was this time) or it will come down to bar placement, might be sitting on a nerve or some shit