
Typing by thinking
Boffins have come up with a way of using your mind to
control a keyboard. The method involves focusing people's minds on letters
and reading what their brain is doing using electrodes.
While this is not the most comfortable of methods of
playing a game or writing a novel, the boffins have got quite excited
about it. They claim their findings make up one more step on the road
to mind-machine interfaces that may one day help people communicate
with just
their thoughts.
They hope to use brain scans to see numbers and maybe
even pull videos from inside people's heads. It all came about when two neuroscientists were monitoring
two patients with epilepsy for seizure activity with electrodes placed directly
on the surface of their brains to record electrical activity generated by the
firing of nerve cells.
Lead investigator Jerry Shin, a neurologist at the Mayo
Clinic campus in Jacksonville tested how well their fledgling mind-machine
interface functioned in these patients. He reasoned it would perform better when electrodes were
placed directly on the brain instead of when placed on the scalp, as is done
with electroencephalography, or EEG.
Shin said that the problem with this technique is that
the scalp and bony skull diffuses and distorts the signal. Shin said that the progress to date on developing these
kind of mind interfaces has been slow because people were unhappy about having
the top of their heads opened and probes shoved in so that doctors can read
their mind. I wonder why.
The patients sat in front of a screen that displayed a
single letter inside each square. Every time a square with a certain letter
flashed and the patient focused on it, the electrodes relayed the brain's
response to a computer. The patients were then asked to focus on specific
letters, and the computer recorded that data as well. After the system was calibrated to each patient's
specific brain waves, when the patient focused on a letter, the letter appeared
on the screen.
"We were able to consistently predict the desired
letters for our patients at or near 100 percent accuracy," Shin said.
So in 2020 to play your shoot-em-up with your mind all
you need to do is have a craniotomy and calibrate each person's brain waves to
desired actions.