A paralyzed man is regaining a sense of touch while using a mind-controlled robotic hand, feeling subtle pressure in his own fingers when the artificial ones are touched. The experiment reported Thursday is an early step in the quest to create prosthetics that can feel.
How it works: Tiny chips implanted in Nathan Copeland's brain are bypassing his broken spinal cord, relaying electrical signals that govern movement and sensation to and from that robotic arm.
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