Brainpower helps ease the route for wheelchair users

Imagine looking at a computer screen displaying several numbers in different boxes and being asked to stare randomly at one number.

Two or three seconds later, the box you are looking at turns green, and in another second, the number in the box is entered automatically into the computer.

The ability to decode thought in this way may sound like the stuff of science fiction. But as brain-computer interface technology has developed, individuals can input data using only brain signals, without any muscle movements.