pharyngotympanic (auditory) tube
Definition: a tube leading from the tympanic cavity to the nasopharynx; it consists of an osseous (posterolateral) portion at the tympanic end, and a fibrocartilaginous (anteromedial) portion at the pharyngeal end; where the two portions join, in the region of the sphenopetrosal fissure, is the narrowest portion of the tube (isthmus); the auditory tube enables equalization of pressure within the tympanic cavity with ambient air pressure, referred to commonly as “popping of the ears.”
Synonym(s): tuba auditivaTA, auditory tube, tuba auditoria, eustachian tube, guttural duct, otopharyngeal tube, otosalpinx, tuba acustica, tuba eustachiana, tuba eustachii
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