UCSF gives paralyzed man a voice after he lost his ability to speak

It's being called a remarkable medical achievement. Doctors at UCSF have given voice to a severely paralyzed man couldn't speak on his own. It involves an implant that reads brain activity and translates those signals into words on a computer screen. KTVU's Alex Savidge spoke with Dr. Edward Chang, Chair of Neurosurgery at UCSF, who's been working on this study for several years.

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