Researchers boost robotic arm movement by adding a sense of touch

Nathan Copeland knows a thing or two about brain implants. More than a decade after a car crash left him paralyzed from the chest down, Copeland enrolled in a medical trial that helped him to regain his sense of touch. The breakthrough saw scientists implant chips in his brain that allowed him to control a robotic hand. Now, in his mid-30s, he's become the focal point of another scientific breakthrough. Thanks to a new brain interface experiment, Copeland was able to feel the sensation of touch when his robotic hand came into contact with a surface or object.