A method and apparatus for monitoring, storing and displaying movements of a person's mandible in relation to the cranium, comprises a plurality of infrared LED's securely mounted to the cranium and to the jaw, in immovable relation to the mandible. The location of each LED, as determined by photodiodes...http://www.google.ca/patents/US4836778?utm_source=gb-gplus-sharePatent US4836778 - Mandibular motion monitoring system
