A module for a brain-computer interface includes means for measuring neuronal activity in at least a portion of a population of neurons; means for stimulating at least the portion of the population of neurons; and means for local processing adapted to pre-analyze measured neuronal activity. A hub for a brain-computer interface includes means for powering a for the brain-computer interface by an alternating current (AC), wherein a charge transmitted in a cycle of the AC is below a tissue-damage threshold. A brain-computer interface comprises the module and the hub. A method for interfacing a brain and a computer includes measuring neuronal activity in at least a portion of a population of neurons; pre-analyzing, locally at a module for measuring and stimulating the portion of the population of neurons, measured neuronal activity; and receiving, at a hub for the brain-computer interface, a pre-analysis of the measured neuronal activity.
MODULAR BRAIN-COMPUTER INTERFACE