> cut two nerves, then push them together, and I can imagine that a signal can still pass through If only.... Getting neurons to regrow or fuse, particularly

> cut two nerves, then push them together, and I can imagine that a signal can still pass through If only.... Getting neurons to regrow or fuse, particularly in the central nervous system, is one of the biggest open challenges in neuroscience. If it were actually that easy, spinal cord injuries would be a thing of the past.