This is related to control of external objects using one's mind. I look on this kind of thing as a promising stopgap until biologic restoration of nerve damage is developed. From Wireless Healthcare.
- Richard

FORTY-ONE neurons is a drop in the ocean compared with the hundred billion or so cells that are present in our brains. But those few neurons could help Eric Ramsey talk again.
It is eight years since a car accident left Ramsey “locked-in” - aware but paralysed and unable to communicate other than through eye movements. By listening in on a tiny population of cells in his brain, neuroscientists hope to give him back his “voice” - a first for someone with his problems.
Ramsey had a wireless electrode implanted 6 millimetres or so below the surface of his brain in 2004 (see Diagram). The electrode records the electronic pulses sent by 41 neurons that surround it in an area of the brain involved in generating speech. By analysing the signals created when Ramsey imagines speaking, the team has developed software that may one day turn his thoughts into speech.
Ramsey is an ideal person to put this treatment to the test, since he was just 19 at the time of the accident, has a normal life expectancy and is capable of participating in several sessions a week. Previous studies have usually involved people who are locked-in as a result of a terminal illness such as amyotrophic lateral sclerosis, a handful of whom have had electrodes implanted to help them move cursors on a computer screen, for example.
Progress with such volunteers has been steady, says Dawn Taylor, a biomedical engineer at Case Western Reserve University in Cleveland, Ohio, and they can move cursors with a skill approaching that of an able-bodied person.