1. A method of restoring at least partial function of a human limb, comprising the steps of: a) surgically removing at least a portion of an injured or diseased human limb from a surgical site of an individual, leaving intact at least one selected muscle from the removed portion of the human limb, including at least one of blood vessels and nerves associated with the at least one selected muscle; b) transplanting the at least one selected muscle into the remaining biological body of the individual; and c) contacting, directly or indirectly, the at least one transplanted selected muscle, or associated nerve, with an electrode, whereby signals can be transmitted to and from at least one of the nerve and its associated transplanted muscle to thereby control a device linked to the electrode and extending from the surgical site, thereby restoring at least partial function of the human limb.