Most of us take our muscles and joints for granted. We expect our joints to move freely without pain; our muscles to have sufficient strength to carry out not only normal day-to-day tasks but also the occasional very demanding ones; and these muscles should also work in synchronisation with joints, nerves, sinews, and other parts of our bodily motor. Following major trauma many, and sometimes all, of these functions can be disrupted and training not only the patient, but also the patient's body, to readjust to the new state means individual therapy for every patient. Sometimes the muscles can be in reasonably efficient condition but the message from the brain to carry out various functions simply doesn't reach it because of damage to the nervous system. Microcomputer systems have been developed which send electrical stimulation directly to the muscles in order to enable the patient to carry out necessary tasks. These systems are constantly under development and are now even allowing persons with damage to their spinal cords to carry out vital functions such as standing, sitting or even walking. It is expected that they will continue to reach higher levels of sophistication in the future. 

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