A Brain Implant Let a Man With ALS Speak and Work Independently for 3,800 Hours

A man with severe paralysis caused by ALS used an implanted brain–computer interface independently at home for more than 3,800 hours over 19 months. The system decoded nearly two million attempted words and enabled speech, messaging, web browsing and full-time work—but it remains an invasive, wired research device tested in only one participant.