Promontory of tympanic cavity

The promontory of the tympanic cavity, also known as the cochlear promontory is a rounded hollow prominence, formed by the projection outward of the first turn of the cochlea.

Promontory of tympanic cavity
View of the inner wall of the tympanum. (Promontory visible near center.)
Latinpromontorium tympani
Anatomical terminology

It is placed between the oval window and the round window, and is furrowed on its surface by small grooves, for the lodgement of branches of the tympanic plexus.

A minute spicule of bone frequently connects the promontory to the pyramidal eminence.

Additional images


This article incorporates text in the public domain from page 1042 of the 20th edition of Gray's Anatomy (1918)

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

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