Description

The entrance to the antrum (Aditus to mastoid antrum) is a large irregular aperture, which leads backward from the epitympanic recess into a considerable air space, named the tympanic or mastoid antrum. The antrum communicates behind and below with the mastoid air cells, which vary considerably in number, size, and form; the antrum and mastoid air cells are lined by mucous membrane, continuous with that lining the tympanic cavity. On the medial wall of the entrance to the antrum is a rounded eminence (Prominence of lateral semicircular canal), situated above and behind the prominence of the facial canal; it corresponds with the position of the ampullated ends of the superior and lateral semicircular canals.


Cette définition contient du texte provenant d'une édition publique de Gray's Anatomy (20eme édition Américaine de "Gray's Anatomy of the Human Body" publiée en 1918 - http://www.bartleby.com/107/).

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