Tongue interface using the Kinect

A research group at The University of Electro-Communications is developing an interface to detect tongue movement using the Kinect.

This interface is intended mainly for training the oral muscles, which include the tongue, for people who have oral motor function disorders affecting their ability to speak or swallow. The research group suggests this as a hygienic detection method, which doesn't require attaching a device to the tongue.

Source:
http://www.diginfo.tv/v/12-0049-r-en.php