Almost all patients who have lost a limb due to organ amputation, paralysis or who were born with a hereditary congenital deficiency would undergo to a mysterious phenomenon called phantom limb. Within this syndrome, patients would sense their missing limb and receive sensations from it. Loss of a limb could be due to many factors, such as congenital deficiencies, spinal cord injury, and amputation of a limb. Although phantom limb sensation and phantom limb pain are strongly related, they should be differentiated. Phantom limb sensation is experienced by nearly all biological and accidental amputees. On the other hand, phantom limb pain is felt almost exclusively following an amputation. According to the U.S. Census, about 80 percent of people with phantom limbs experience extreme, excruciating pain coming from their stump. Indeed, Ramachandran and Hirstein, authors of “The Perception of Phantom Limbs” (1998), report that pain torments victims and remains painful even 25 years after the loss of the limb. Thus, suffering is chronic especially after immediate limb amputation, where patients describe the pain as itching, burning, stabbing or tingling. In most cases, the pain interferes with work and social life and becomes a heavier burden than the paralysis itself. There is nothing truly phantasmal or imaginary about this suffering; however, contrary to what amputees feel, the pain is generated by the brain and does not originate in a limb that does not exist. To be more precise, 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 modernly discovered event; However, the exact cause of this sensation has puzzled scientists to dec...... middle of paper ......ter shield an arm that had been placed on its stump. When Ture Johanson saw his arm on the computer screen, he was able to control his own movements using his own neural commands. In this particular study, Johanson was asked to perform numerous movements with his phantom hands, like driving a race car. While driving a race car, Catalan found that the subject moved the muscles at the end of the existing arm to show an intention to move the missing hand. From this study, subjects who had experienced PLP for several years had longer periods without pain and shorter periods of severe pain. Additionally, the phantom hand was relaxed from a clenched fist to a semi-open position. This study is different from others because the control signals are recovered from the arm stump and therefore the affected arm is responsible. Furthermore, it uses signals from the damaged limbs themselves.