Medgadget -- Researchers at the University of Jena, Germany have developed a prosthesis that may help reduce phantom limb pain. Phantom limb pain, which according to some studies may affect up to 80% of amputees, is an often intermittent, painful post-amputation sensation. This neuropathic pain is the result of a series of peripheral and central nervous system changes that follow amputation. It can be excruciating and is very difficult to treat.