Mastoid antrum
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| Mastoid antrum | |
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| Coronal section of right temporal bone. ("Tympanic antrum" labeled at upper left.) | |
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| The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view. ("Mastoid antrum" labeled at upper left, in dark circle.) | |
| Gray's | subject #230 1042 |
Mastoid antrum (or tympanic antrum) is a cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aperture of the mastoid antrum.
