Phantom Limb Pain: The Perception Of Phantom Limb

Almost all patients who have lost a limb due to an organ amputation, paralysis, or were born with inherited birth deficiency would undergo a mysterious phenomenon called phantom limb. Within this syndrome, patients would have a perception of their missing limb and would receive sensations from it. Limb loss could be due to many factors, such as congenital deficiencies, spinal cord injuries, and amputation of a limb. Although phantom limb sensation and phantom limb pain are strongly correlated, they should be differentiated. Phantom limb sensation is experienced by almost all biological and accidental amputees. On the other side, phantom limb pain is almost exclusively experienced as a result of an amputation.

According to the U.S census, about 80% of people with phantom limb experience extreme excruciating pain coming from the stump. In fact, Ramachandran and Hirstein authors of “The Perception of Phantom Limbs” (1998) report that the pain haunts victims and remains painful even 25 years after loss of limb. Hence, suffering is chronic especially after an immediate amputation of a limb, where patients describe the pain as itching, burning, stabbing, or tingling. In most cases, pain interferes with work and social life and becomes a heavier burden than the paralysis itself. There’s nothing really phantom or imagined about this suffering; however, contrary to what the amputees feel, the pain is generated by the brain not originated in a limb that doesn’t exist. To be more specific, the intensity of the pain could be found in the neurons of the brain. With this in mind, one must be sure that phantom limb syndrome is certainly not a modern discovered occurrence; however, the exact cause of this sensation has puzzled scientists for dec...

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...ter screen an arm that was placed onto his stump. When Ture Johanson saw his arm on the computer screen, he was able to control his own movements using his own neural command. In this particular study, Johanson was asked to perform numerous movements with his phantom hands such as driving a racecar. By driving a racecar, Catalan found that the subject moved muscles at the end of his existing arm to show the intent of moving his missing hand. From this study, subjects who had been experiencing PLP for several years had longer periods without pain and had shorter periods of intense pain. In addition, the phantom hand was relaxed from a tight fist to a half-open position. This study is different from others because the control signals are retrieved from the arm stump, and thus the affected arm is in charge. Moreover, it uses the signals from the damaged limbs itself.