"In a paper published in Neuron, scientists from the Salk Institute in San Diego reported that they were able to watch spinal cord cells walk around the spine of mice in real-time. They used a special microscope that could track and record the movement of motor neurons, an important nerve cell that controls the movement of muscles in your body."

http://blog.cirm.ca.gov/2015/09/03/w...s-take-a-hike/