The Auditory (Pharyngotympanic) tube


   
  

Function
Equalize pressure in the middle ear, with atmospheric pressure by allowing free movement of the tympanic membrane.
 
Blood supply
  • Ascending pharyngeal artery
  • Middle meningeal artery
  • Artery of the pterygoid canal

*Veins pterygoid plexus.

  
Innervation
  • Tympanic plexus
  • Pterygopalatine ganglion

The cartilaginous part of the tube remains closed, except during swallowing or yawning. The tube is opened by simultaneous contraction of the tensor paliti and salpingo pharyngeus muscles, which are attached to opposite sides of the tube.


The Larynx and the Ear