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Research into spinal cord injury using brain implants has enabled a monkey to move its leg again only a few days after the injury. The hope is that this will lead to trials in humans with similar injuries by the end of the decade. Dr Andrew Jackson at the Institute of Neuroscience at Newcastle University in northern England, who has conducted similar research, told Dan Damon the artificial connection restored a lost pathway to the monkey's leg. (Photo: Image of monkey in research; Credit: EPFL)