Yoky matsuoka grew up dreaming of becoming a top-ranked tennis pro, but she wasn't your average jock. She spent a lot of on court time pondering how her brain was controlling her hand, allowing her to smoothly swing her racket at just the right time and angle. More than a decade and several mechanical hands later, Matsuoka is still chasing the same question. But now she's pursuing it by trying to build the ultimate prosthetic—a fully functional replica of the human hand, controlled directly by the brain.
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