This man with ALS is “the first power user” of a brain implant that lets him speak
Casey Harrell, a man with ALS, has become the first 'power user' of a brain implant that allows him to speak, with thousands of hours of use over almost three years. The implant, which has a 97.5% accuracy rate, has enabled Harrell to communicate and even work independently. Harrell's experience is a significant breakthrough in the development of brain-computer interfaces.