Some morphological aspects of the meatus acusticus externus in connection with mandibular movements.
A method is described to measure volumetric variations in the meatus acusticus externus caused by the movements of the mandible. Simultaneous registration of EMG activity and gnatho-sounds demonstrated that after tooth contact a slight decrease in volume, followed by some increase in volume takes place within 20-30 ms. The fast volume changes, during and after tooth contact, seem to be correlated to the speed of closure.
D004424:Ear Canal / Q000033:anatomy & histology*; D004576:Electromyography; D006801:Humans; D008335:Mandibular Condyle / Q000033:anatomy & histology / Q000502:physiology*; D009068:Movement; D013016:Sound; D014070:Tooth / Q000502:physiology; D014159:Transducers