Doctors have devised a new way to treat amputees with phantom limb pain.
Using computer-generated augmented reality, the patient can see and move a virtual arm controlled by their stump.
Electric signals from the muscles in the amputated limb “talk” to the computer, allowing real-time movement.

Mr. Johanson, who is 73 and lives in Sweden, lost half of his right arm in a car accident 48 years ago. Within weeks of starting on the augmented reality treatment in Max Ortiz Catalan’s clinic at Chalmers University of Technology, his pain has now eased.
Source: http://www.bbc.com/news/health-26327457