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cyborgShining Science
•84% Informative
Some see a future in which we alter memories and download skills but major challenges remain.
Growing number of people paralysed from spinal cord injuries, strokes or motor conditions are regaining lost abilities.
Brain-computer interfaces (BCIs) work by detecting electrical signals from neurons using metal discs, wires or electrodes that are inserted into the brain.
BCI researchers often put electrodes in the hand region because people tend to imagine moving their hands to do useful things, such as type or manipulate a joystick or robotic arm.
In the past few years , the capabilities of experimental devices that translate brain activity into movement and even speech have surged ahead.
Ann Johnson , who lost her ability to speak following a stroke, used an electrocorticography array to operate an avatar on a computer near her that spoke for her at 78 words per minute.
This suggests that the motor cortex is organised according to complex concepts, such as actions, rather than body parts.
Engineering challenges still dog the field.
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