Last revised by Francis Deng on 28 Sep 2019

The cog is a coronally oriented bony process in the middle ear cavity of the temporal bone that projects from the tegmen tympani, separating the anterior epitympanic recess from the posterior epitympanum. The cog ends anterosuperior to the head of the malleus and superior to the cochleariform process. It is also known as the anterior attic bony platetransverse ridge, or transverse crest 1-3.

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