How researchers think that they prosthetic helps relive phantom limb pain is, the new prosthetic is covered in pressure sensors, and it works by sending electrical signals from these sensors to the intact nerves in what remains of the patient's arm. The brain interprets these signals to mean the patient has a hand that is touching something. A researcher states, "We don't know if it's because now that they're getting natural feedback, the brain is reincorporating the prosthetic hand, or because of other mechanisms", then goes on to say, "it doesn't appear related to the stimulation
