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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, preventing me from falling. here's the thing, all these different therapies work together. music isn't just rehabilitating the mind, it's also teaching patients to walk. and sometimes -- >> i'll give them a song to kind of get...

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...

>> it will start to feel like tingling in your calf. >> reporter: but this bike doesn't let you forget. these little cords here attach to the muscles in my leg. as my leg is moving, it's predicting which muscle should be using and giving that muscle a stimulation. they call this the superman device. learning to walk without the burden of my body weight. >> 30% of your body weight has been taken out. >> reporter: surprisingly, the shopping cart is also used as part of therapy. take a look here. obviously julie helping if i have right leg weakness, moving my leg along, preventing me from falling...

Has suffered a catastrophic injury. >> after a brain injury or stroke, there is a tendency for the patient to forget one side of the body. >> reporter: just neglect it? >> just neglect it. >> reporter: but this bike doesn't let you forget. as my leg is moving, it's predicting which muscle should be using and giving that muscle a stimulation. they call this the superman device. learning to walk without the burden of my body weight. >> 30% of your body weight has been taken out. >> reporter: surprisingly, the shopping cart is also used as part of therapy. take a look here. obviously julie helpin...

Shopping cart is also used as part of therapy. take a look here. obviously julie helping if i have right leg weakness, moving my leg along, preventing me from falling. >> okay, it's pen, use your lips. >> reporter: now remember, with congresswoman giffords, speech is also a concern. 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 â...