BrainGate

BrainGate was developed by the bio-tech company Cyberkineticsin 2003in conjunction with the Department of Neuroscience at Brown University. The device was designed to help those who have lost control of their limbs, or other bodily functions. The computer chip, which is implanted into the brain, monitors brain activity in the patient and converts the intention of the user into computer commands. Currently the chip uses 100 hair-thin electrodesthat 'hear' neuronsfiring in specific areas of the brain, for example, the area that controls arm movement. The activity is translated into electrically charged signals and are then sent and decoded using a program, thus moving the arm. According to the Cyberkinetics' website, two patients have been implanted with the BrainGate system.

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It uses material from the http://en.wikipedia.org/wiki/BrainGate Wikipedia article BrainGate.