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The BrainGate Neural Interface System is currently an investigational device that allows some people with severe brain injuries and motor disabilities to regain the capacity to communicate and control computers, as well as household devices such as a TV set.

The BrainGate system is based on specialized technology developed to sense, transmit, analyze and apply the language of neurons - in essence, interpret brain signals. The system consists of a sensor that is implanted on the motor cortex of the brain and a device that analyzes the brain's output.

According to Cyberkinetics Neurotechnology Systems, BrainGate's developer, the principle of operation behind the BrainGate System is that with intact brain function, brain signals are generated even though they are not sent to the arms, hands and legs.

The signals are interpreted and translated into cursor movements, offering the user an alternate "BrainGate pathway" to control a computer with thought, just as individuals who have the ability to move their hands use a computer mouse.

The system could be further developed to potentially provide limb movement to people with severe motor disabilities. Limb movement developments are currently at the research stage and are not available for use with the existing BrainGate System. The BrainGate neural interface system is not yet approved for sale and is available only through a clinical study.

Source: Cyberkinetics Neurotechnology Systems