For years, researchers have been exploring the potential for brain-computer interfaces (BCIs) -- systems that connect up the human brain to external technology -- to restore movement to people with paralysed limbs, using electrode arrays implanted directly on the brain's surface.
In the future, however, US government-backed research could enable the use of BCIs without any surgery at all -- and they may first see use as a way of giving soldiers an advantage on the battlefield.
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