Elon Musk's brain-computer interface company, Neuralink, says it has expanded its human clinical trials to 21 participants worldwide, marking two years since it began testing its brain implant technology on humans.
The company said the increase reflects growing confidence in the safety and performance of the implant, which allows users with spinal cord injuries to control digital tools using their thoughts. Earlier participants have demonstrated the ability to play video games, browse the internet and operate computer cursors hands-free.
