Muscle and Nerve Illnesses consume the organs which enable us to keep our strength. These organs consist of: the spinal cord, the nerves that extend from the spinal cord and the muscles which are sustained by these nerves. Just as there are muscular illnesses, there may also be illnesses along the nerves which control these muscles; the ones that start from the spinal cord and continue onto the point where they connect with muscles. The symptoms of the illness may change according to the source. But, among all the symptoms, weakness is seen among all of them.