From Brain waves to Typing

Scientists from the Mayo Clinic have developed a process using brain waves to type characters on a computer screen, which researchers say is a step toward helping people better control prosthetic limbs.
The experiment at the Jacksonville, Fla., clinic involved two patients with electrodes attached to their brain. The patients were able to type by just thinking about individual letters.
the technology could eventually help people with disorders such as Lou Gehrig's disease or spinal cord injuries control prosthetic arms or legs.
He said potentially millions of people could benefit from such a brain- computer interface.
The technology is currently limited because it requires electrodes to be attached directly to the brain. The electrodes would relay the brainwaves to an attached computer, though Shih said there is a possibility the computers could become small enough to be implanted.