This non-fiction book provides information about the latest findings on research and therapy of nerve regeneration with catchy drawings and in understandable words. Why do nerves in the extremities regenerate, but the axons in the spinal cord do not? Can transplanted stem cells or biopolymers restore regeneration? Are bioprostheses able to functionally replace amputated arms or legs? Neuroscientist Lars Klimaschewski answers these questions and reports on exciting findings from anatomy, cell and molecular biology and neurotechnology. Find out, among other things, how a brain-computer interface processes signals from the brain in order to control the arm or leg muscles again via electrodes after a paraplegia. The translation was done with the help of artificial intelligence. A subsequent human revision was done primarily in terms of content.