There are three main nerves that supply nervous stimulation to the hand: the ulnar nerve, the median nerve, and the radial nerve. Injuries may cause a lessening in ability to move the hand and experience feeling. While some nerve injuries may heal on their own, others require surgery. Surgery to investigate a damaged nerve that is not complicated by other injuries is usually performed early after the injury occurs in order to increase the likelihood of a full recovery. Nerve repairs that are associated with other, more complicated, injuries may occur weeks after the trauma. If severed, your surgeon may repair the nerve by reattaching it directly to the other end of the nerve, or by using a nerve graft (inserting nerves from other areas of the body in place of the damaged nerve) to repair the damaged section.