QUADRIPLEGIC BRAIN IMPLANT. “In 2012 quadriplegic Jan Scheuermann had two electrode arrays implanted in her brain’s left motor cortex. Within a week, she could use the implant to move a prosthetic arm in all three dimensions, and move its wrist in an additional four. That was good enough for her to use it to feed herself with the arm, and good enough to make her a national celebrity.”
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