When a nerve is cut: Both the nerve and the insulation are severed sometimes the fibers inside the nerve break while the insulation remains intact if the insulation has not been cut the end of the fiber farthest from the brain dies the end that is closest to the brain does not die after some time it may begin to heal new fibers may grow beneath the intact insulating tissue until reach the muscle or skin.
Answered 3/11/2014
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