Kelly Thomas woke up in a Florida hospital four years ago with no recollection of the car accident that had robbed her of the ability to walk. Thomas, an active college student who had barrel-raced in rodeos, moved to Kentucky for a year to try out a research study that she hoped would retrain her spinal cord on how to walk.

In February, a trainer who had been scooting along the floor at Thomas's feet, helping her move her legs and place her feet as she used a walker, stopped and stood up.

Read more at Chicago Tribune.