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Bob Goodman, a rancher in Halfway, Oregon, lost his arm in a freak accident. Researchers at the University of Utah gave him a myoelectric arm, which he controls by flexing the muscles in his arm that are still intact. Sensors on the inside of the prosthetic arm socket pick up the faint electrical signals from the muscles and amplify them to control the robot arm. In this way, Goodman can do most things as he did before his accident. Here he is arm-wrestling with a neighbor in a local bar called the Sportsman's Club: showing off the strength of his electric arm motor. (Actually the arm has no lateral force, only frontal, but the hand does have more gripping power than a normal hand.)

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USA_SCI_MEARM_07_xs.jpg
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©1998 Peter Menzel .www.menzelphoto.com
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Robo sapiens: United States
Bob Goodman, a rancher in Halfway, Oregon, lost his arm in a freak accident. Researchers at the University of Utah gave him a myoelectric arm, which he controls by flexing the muscles in his arm that are still intact. Sensors on the inside of the prosthetic arm socket pick up the faint electrical signals from the muscles and amplify them to control the robot arm. In this way, Goodman can do most things as he did before his accident. Here he is arm-wrestling with a neighbor in a local bar called the Sportsman's Club: showing off the strength of his electric arm motor. (Actually the arm has no lateral force, only frontal, but the hand does have more gripping power than a normal hand.)
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