Tympanic plexus

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Tympanic plexus
View of the inner wall of the tympanum. (Grooves for tympanic plexus labeled at center.)
Plan of the facial and intermediate nerves and their communication with other nerves. (Tympanic plexus labeled at center.)
From caroticotympanic nerves, tympanic nerve
Latin plexus tympanicus
TA A14.2.01.140
FMA 77533
Anatomical terms of neuroanatomy

In the tympanic cavity, the tympanic nerve (a branch of CN IX) divides into branches which, along with sympathetic fibres from the carotid plexus, form the tympanic plexus. This plexus is located on the surface of the promontory.

This tympanic plexus gives off:

The branches of the tympanic cavity provide innervation to the mucosa of the middle ear. The lesser petrosal nerve provides autonomic parasympathetic fibers that eventually innervate the parotid gland.


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links[edit]

  • cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (IX)
  • lesson3 at The Anatomy Lesson by Wesley Norman (Georgetown University)