It is said that this device operates and taps into the hypglossal nerve which is connected to the brain a part that can be seen in the man 's tongue (The All Need , 2006 . Though there are physical limitations in this equipment such as it does not operate on a switch based or sip-and-puff device , the Tongue Drive System has components that are appealing even to the disabled person . Its strength lies in the way it is designed simple yet...











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