Mind Reading: Technology Turns Thought Into Action

An old technology is providing new insights into the human brain.

The technology is called electrocorticography, or ECoG, and it uses electrodes placed on the surface of the brain to detect electrical signals coming from the brain itself.

Doctors have been using ECoG since the 1950s to figure out which area of the brain is causing seizures in people with severe epilepsy. But in the past decade, scientists have shown that when connected to a computer running special software, ECoG also can be used to control robotic arms, study how the brain produces speech and even decode thoughts.

In one recent experiment, researchers were able to use ECoG to determine the word a person was imagining.

"This is both very exciting and somewhat frightening at the same time," says Gerwin Schalk, a researcher who studies ECoG at the New York State Department of Health's Wadsworth Center in Albany. "It really goes pretty close to what people used to call mind reading."

http://www.npr.org/2011/05/12/135598390/mind-reading-technology-turns-thought-into-action