Three paraplegic patients can walk again thanks to an intense rehabilitation program with a device that sent electricity down his spine, researchers report Monday in two separate studies.

A snowmobile accident nearly 4 years earlier had paralyzed the then 26-year-old Jered Chinnock from the middle of his back down. He couldn’t move or feel anything below his sixth thoracic vertebrae — a spinal segment in the middle of the rib cage — where he had broken his back. Now, he can voluntarily m