Uri Geller, move over. There's a new monkey in town.
From Scientific American August 2008
Neuroprosthetics took another step forward when University of Pittsburgh researchers got two rhesus macaques to feed themselves using mentally controlled robotic arms. The scientists connected a grid of 100 electrodes to neurons in the monkeys’ primary motor cortex. The grid picked up the neural activity and relayed it to a computer that controlled a nearby prosthetic arm. The monkeys succeeded in grabbing and eating fruit dangled in front of them 61 percent of the time, which, though lower than hoped, compares favorably to similar efforts in which monkeys (and humans) have moved objects in virtual environments [see “Controlling Robots with the Mind”; SciAm, October 2002]. Many challenges remain, however, before people can ever be fitted with mind-controlled limbs—the electrodes, for instance, must be made more durable and the gripping force of the prosthetics more variable. Grab onto these results in the May 29 Nature.
—Nikhil Swaminathan
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