Phantom limb pain occurs when the brain's representation of an amputated limb remains intact and its activity levels ramp up due to lack of proprioceptive feedback.

“and that's because the representation of that hand is still intact in the cortex, in the brain, and it's trying to balance its levels of activity.”

“that's because the representation of that hand is still intact in the cortex in the brain and it's trying to balance its levels of activity normally it's getting what's called proprioceptive feedback proprioception is just our knowledge of where our limbs are in space and there's no appropri receptive feedback and so a lot of the circuits start to ramp up their levels of activity and they become very conscious of the Phantom limb”