 The goal of the clinical investigation is to reduce phantom limb pain PLP, a painful condition affecting 70 of amputees, so as to improve these patients quality of life. Traditionally, mirror box therapy and other tools based on the same concept, have been used to alleviate pain, but their efficacy varies greatly. This project targets amputees for whom other PLP treatments have failed. Various virtual environments, including virtualaugmented reality, are controlled by the patients phantom limb using muscle myoelectric signals from the stump. The patient learns to reactivates areas in the brain related to motor control of the missing limb. 