reporter: it's here at luf university in georgia that carrick is a pioneer in a field known as chiropractic neurologyent he's been perfecting for 33 years. when hockey superstar sidney crosby suffered serious concussions, he praised dr. carrick for saving his career. >> let me see you do it on your all about reactivating parts of the brain. is this a miracle cure? >> i think miracles are things that only happen once in awhile. and what we find is that the miracles that we see, we're seeing them frequently, every day, so, they're not really miracles. what we do is amazing, because of what human kind can do. >> can you see your left hand there? >> reporter: in this exercise, carrick uses a full length mirror on will, to trick his mind's eye with his own mirror image of a healthy arm, in order to reprogram his brain. >> when you lift your hand up all by yourself, your left hand. >> reporter: a few minutes ago, will couldn't lift his left arm without help. but now, this. for will, it's huge. >> okay. good man. >> reporter: but the big gun in carrick's arsenal is this machine. carrick says the gyrostim he