Mind over matter: EECoG may finally allow enduring control of a prosthetic or a paralyzed arm by thought alone

A biomedical engineer is developing brain-computer interfaces based on grids of electrodes that lie beneath the skull but outside the dura mater, the protective membrane that covers the brain. His next project is to slip a thin 32-electrode grid he designed with a colleague under a macaque's skill and to train the monkey to control -- strictly by thinking about it -- a computational model of a macaque arm.

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