This looks interesting I had heard a bit about it a couple months ago. Friend of mine went down to Seattle to get more surgery done on his back and a doctor there was trying to talk him into putting some sensors in his back and neck. Not sure if it was for the same thing but he said no as he has just too much going on right now.

http://spectrum.ieee.org/biomedical/devices/spinal-stimulation-gets-paralyzed-patients-moving#.UmvYb5KgvBM.email?utm_source=CPA+%28Albert a%29+WHEEL-E+Newsletter+DECEMBER+2013&utm_campaign=December+2 013+Wheel-E&utm_medium=email

Mooner