By Tanya Lewis, LiveScience The phantom limb pain many amputees experience may be linked to residual representations of that limb in the brain, a new study finds. "About 80 percent of amputees experience phantom pain," lead study author Tamar
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Learn about the symptoms of phantom limb pain after amputation and why it happens, as well as the available treatment options and resources.
Phantom limb pain is a mysterious phenomena in medicine that refers to the ongoing and sometimes unbearable pain a person feels coming from an amputated limb that is no longer there. Roughly two-thirds of all amputation patients experience this pain, and for most, it typically goes away within a year. If you have just undergone …
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Phantom limb pain is the pain experienced following loss of a limb, either from injury or amputation. This sensation of pain was previously thought to be caused by abnormal plasticity in the sensorimotor cortex of the brain, and rehabilitative therapies have focused on restoring normal motor function to relieve the pain. However, conflicting results left the question of whether and how phantom pain is caused by changes in sensorimotor activity unanswered.
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A new kind of stem cell raises the prospect of regenerative treatments that mimic the way salamanders grow new limbs, say scientists. Therapies based on "induced multipotent stem" (iMS) cells could be tested in human trials as early as next year, according to Australian researchers. The team, from the University of New South Wales, demonstrated a way of producing iMS cells by reprogramming bone and fat cells. In theory, the cells could be used to repair bone, cartilage, and muscle.
Changes in communication between sensory and motor areas of the brain after lower limb amputation could explain phantom sensation, even without pain.
The robotic nervous system is somewhat complicated, but follows the same methods used by humans to identify pain.