PROSTHETICS
From space labs to hospital operating rooms, American technologists pride themselves on being able to miniaturize the most delicate equipment. But last week it was a Russian achievement that stirred their admiration. Soviet scientists have turned out a highly sophisticated and dexterous artificial arm that weighs less than 3 lbs., and is driven by the minuscule electrical impulses of the wearer's own nerves.
Prosthetics experts from the U.S. learned six years ago that the Russians were working on such an arm, but then the gadget needed a 500-lb. electrical-power unit to drive it. Now, Charles E Yesalis, an executive of Michigan's...
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