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A Lifelike Prosthetic Arm

A new surgical technique, developed by scientists at the Rehabilitation Institute of Chicago, allows patients who have lost arms to use residual nerve signals to control a prosthetic limb. This video shows three patients testing a prototype limb being developed by DARPA. The patients can perform complex tasks, including picking up a cup, grasping a cracker without breaking it, and putting a spoon in a cup.

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