Conflicts from World War I to Afghanistan coupled with remarkable advances in electronic and digital technologies are the chief factors that have led to the current generation of advanced prosthetic limbs, according to this overview article. "What amputees say after using a microprocessor knee is, 'I don't have to think anymore about walking,' " says Mark Agro, president and CEO of Otto Bock Canada. The newest frontiers in prosthetic research are restoration of touch and thought-controlled prostheses.

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