Graded changes in body position produced no noticeable changes in wax registrations of dental contact patterns resulting from voluntary jaw closure. Occlusal contact patterns that resulted from electrically stimulated jaw closures indicated an increase in closing force and a mesial shift of prime occlusal contact points as the body was raised to an upright position.
Chewing and swallowing sounds that were recorded on magnetic tape by means of a paralaryngeally placed contact microphone were used to evaluate temporal relationships of the events of the swallowing cycle in young women. Temporal inter-event parameters indicate a reflex nature for the initiation of swallowing, and the effects of topical anesthesia suggest a triggering mechanism for swallowing similar to the gating theory for pain proposed by Melzack and Wall.
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