When Joel Gerber lost a hand in an industrial accident in 1952, its replacement was a carved piece of wood. Today, at 78, he uses a myoelectric prosthesis with moveable fingers and thumb -- although he is still adept at performing many tasks one-handed. Gerber's story illustrates the remarkable advances in prosthetic technology in recent decades, advances that include the programmable C-Leg, with its microprocessor knee, and the i-Limb.

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