Tongue mouse: Cursor control with your mouth

I wanted to test the idea of using the tongue to control a computer. The most obvious way would be to map x, y coordinates in a Windowsstyle UI with tongue movements constrained to a plane. This doesn t work terribly well, as even though the tongue has fine motor control, it s very difficult to smoothy achieve the 2D movements needed to operate a system that has been developed around a classic mouse. I think there is possible applications for swipe interfaces, carousel menus, yes, no input, etc.