especially since she has a trache and learning to use it is part of therapy. >> what we have here is a speaking valve. if they're tolerating that, we'll try to get them to speak. >> reporter: but hear's the thing. all these different therapies work together. for example, remember music therapy? >> i'm going to go ♪ lean two, three, four push up, two, three, four ♪ >> reporter: the music isn't just rehabilitating the mind but teaching patients to walk. and sometimes -- >> and i'll give them a song to get their mind off the pain. ♪ oh, when the saints go marching in ♪ >> it's cool to see that up close. when people talk about rewiring the brain, what does that mean? >> i learned a lot, as well. rewiring the brain basically means you're trying to use redundant pathways in the brain.