Non-invasive zaps to the spinal cord can treat paralysis—but no one knows why - Enlarge / Trial participant Sherown Campbell manipulating a Rubik's Cub... - https://arstechnica.com/?p=2026123 #spinalcordinjury #non-invasive #quadriplegia #tetraplegia #spinalcord #stimulator #paralysis #science #health #hand #arm