Scientists at the University of Manchester, UK, has developed 3D virtual reality computer graphics to combat phantom limb pains suffered by amputees:
By putting on a headset, patients will see themselves with two limbs. They can use their remaining physical limb to control the movements of a computer-generated limb, which appears in the 3D computer-generated world in the space of their amputated limb. ...
Phantom limb pain or PLP is discomfort felt by a person in a limb that is missing due to amputation. Previous research has found that when a person's brain is 'tricked' into believing they can see and move a 'phantom limb', pain can decrease.
... But this initial project has produced startling results, with four out of the five patients reporting improvement in their phantom limb pain. Some improvements were almost immediate.