Brain-computer interfaces
Implants that read signals from the brain and turn them into actions on a screen or a device. Today they are medical devices being tested with a small number of people with paralysis.
- Neuralink reported its first human implant in early 2024. The participant, who has quadriplegia, has described controlling a computer cursor by thought.
- Other groups, such as Synchron, use a device placed through a blood vessel rather than open-brain surgery.
Restoring speech, movement and independence to people who have lost them.
These are early trials. Long-term safety, cost and who gets access are still open questions.






