THE EUSTACHIAN TUBE: ABNORMAL PATENCY AND NORMAL PHYSIOLOGIC STATE

摘要: Johannes Muller, 1 writing about the ear in his monumental handbook of physiology, stated that he could produce a snapping sound ears associated with contraction palatine muscles and elevation soft palate. He said, "If immediately afterwards I emit humming vocal tone while my mouth is either closed or only slightly open, this has an extraordinary resonance." not explain phenomenon but believed it had something to do tensor tympani muscle; given much thought function eustachian tube, did correlate its opening. continuously open. It was Toynbee, 2 1853, who concluded from experiments on himself tendency swallow descending diving bell tube normally opens during