With brain-computer interfaces, people with physical disabilities could one day control computers with just their thoughts, according to the co-founders of Precision Neuroscience. The company is developing an implant that could interpret and transmit electrical signals on the surface of the brain into actions on a screen. CEO Michael Mager and Chief Science Officer Benjamin Rapoport spoke with WSJ reporter Rolfe Winkler at WSJ Tech Live about how the technology works and the ways it could transform peoples’ lives. Danny Lewis hosts. Sign up for the WSJ's free Technology newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices