it in. >> reporter: it's called music therapy. many people never see how it or much of the technology, big or small in this building, actually works. so i will show you. if i, like congresswoman giffords, were a patient of this team. it seems like a pretty long day. >> it is a long day. after a brain injury or a stroke there is a tendency for the patient to forget one side of the body. >> reporter: just neglect it? >> neglect it. >> reporter: this bike doesn't let you forget. these cords attach to the muscles in my leg and as my leg is moving it's predicting which muscle should be using and it's giving that muscle stimulations. they call this the superman device, learning to walk without the burden of my body weight. surprisingly this shopping cart is also used as part of therapy. take a look here, obviously julie helping, for example, if i had right leg weakness, really sort of moving my leg along,