Between 50 and 80 percent of amputees experience phantom limb sensations, feelings that an absent limb is still present. These sensations are often painful. In the early 1990s, neurologist Vilayanur S. Ramachandran hypothesized that the phenomenon might be caused by changes in the brain rather than in peripheral nerves and developed the mirror box to alleviate the discomfort. A simple device, it creates the visual illusion that the phantom limb has reappeared. How is this believed to help? Discuss
Source: The Free Dictionary