This Man Controls His Prosthetic Arm With His Thoughts
The new system is a game changer, test patient Johnny Matheny says. “Before, I had limited range,” he says. “I couldn’t reach over my head and behind my back. Now—boom!—that limitation is gone.” (Credit: JHUAPL)

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Johnny Matheny has become the first amputee to undergo surgery to reattach the nerves of his arm to an advanced prosthetic device, allowing him to move the robotic arm with his thoughts. Matheny, who lost his left arm to cancer in 2008, has been a proponent of advanced prosthetics for years — and is excited to…

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