Mr. Mireles, 37, tested the equipment one recent afternoon by guiding a wheelchair through an obstacle course lined with trash cans. Mouth closed, he shifted the magnet to travel forward and backward, left and right.[...]
To operate the system, the user wears a headset with sensors that pick up magnetic signals from the tongue ring. Moving the tongue to the mouth’s upper left corner, for instance, moves the wheelchair forward. (The researchers hope that in the future, touching each tooth could signal a different command, from turning on the television to answering the phone to opening a door.)
Researchers decided to use the tongue because they wanted to take advantage of some of the functions a severely disabled person still had. The tongue does not tire easily, they said, and it is not usually affected by a spinal cord injury because it is directly connected to the brain through a cranial nerve.
Link -via Gizmodo | Photo: Steve Kagan/NYT