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Phantom Limb Syndrome and the Mirror Box

By Anonymous
        After seeing the rubber hand video, I started thinking about phantom limb syndrome which can occur after a person has an amputation. I found a video about a man who is missing an arm, yet "experiences" a sensation of pain in the place where his hand would be. The video explains how the brain does not really know that the limb is no longer there and so sends signals directed toward his hand, trying to clench it. If this man did have a hand, his muscles would send feedback to the brain telling him to slow down the motion, however since he has no hand, the brain sends more signals resulting in a positive feedback loop. The solution is a mirror box. The man places the hand he does have in a box with a mirror, and his hand is reflected so it looks as if he has two. The ultimately tricks the brain with visual feedback and relieves the pain felt. This illusion shows us how easily the brain can be deceived, and emphasizes how our sensations can be psychological.

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