There are nearly 2 million people living with limb loss in the United States. Approximately 60 to 80% of such amputees experience phantom sensations in their amputated limb, and the majority of the sensations are painful (this pain is called "phantom limb pain" (PLP)). Pharmacotherapy, surgery, and traditional adjuvant therapy (e.g. physiotherapy, massage, and ultrasound) are also not consistently effective. There has been clinical research showing that mirror therapy -- a way of positioning mirrors so that it visually convinces the amputee that he/she still has the missing limb -- is effective for some patients. We believe that an AR system that enables myoelectric control of a virtual limb and provides a visual simulation of the affected limb will be an effective and useful tool in the arsenal of treatments for PLP and post-stroke rehabilitation.