Mind-controlled prothesis takes one step closer to reality

The goal is a Star Trek-like melding of mind and machine, combining what's considered the most humanlike bionic arm to date - even the fingers bend like real ones - with tiny chips implanted in the brain. Those electrodes tap into electrical signals from brain cells that command movement. Bypassing a broken spinal cord, they relay those signals to the robotic third arm.
This research is years away from commercial use, but numerous teams are investigating different methods.

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