Brain-computer interface trials are taking off

Casey Harrell, a man diagnosed with ALS, is the first "power user" of a brain-computer interface (BCI) that allows him to communicate and perform tasks despite paralysis. Harrell, who has been using the BCI since July 2023, can now "speak," browse the internet, and continue his work as a climate activist with significant independence. Researchers at the University of California, Davis, have continuously refined the device's accuracy and introduced features like a privacy mode and a profanity filter, enabling Harrell to communicate with his daughter without accidental expletives. Harrell describes the BCI as "nothing short of revolutionary," crediting it with helping him maintain employment, reconnect with loved ones, and read to his daughter. His BCI is one of several projects aiming to restore communication and independence for individuals with paralysis. Harrell volunteers his participation to advance scientific research and benefit personally, joining a growing number of individuals contributing to BCI trials. This year marked a significant milestone as China became the first nation to approve a BCI for medical use, signaling a surge in BCI research and development driven by technological advancements that offer expanded functionalities.