Aditus to mastoid antrum

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Aditus to mastoid antrum
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The medial wall and part of the posterior and anterior walls of the right tympanic cavity, side view.
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Coronal section of right temporal bone
Details
Identifiers
Latin aditus ad antrum mastoideum
TA98 A15.3.02.021
TA2 6910
FMA 56797
Anatomical terminology

The aditus to mastoid antrum (otomastoid foramen) is a large, irregular opening [1] upon the posterior wall of the tympanic cavity by which the mastoid antrum (situated posteriorly) communicates with the epitympanic recess of the tympanic cavity (situated anteriorly). [2] The walls of the antrum are lined by mucosa which is continuous with that lining the mastoid cells and tympanic cavity. [3]

Contents

The medial wall of the aditus features a ridge created by the underlying facial canal, and a bulge created by the underlying ampulla of the lateral semicircular canal. The short limb of incus is lodged in a shallow fossa upon the posterior wall of the tympanic cavity just inferior to the aditus. The pyramidal eminence is situated inferior to the aditus. [2]

See also

References

  1. ↑ Gray, Henry (1918). Gray's Anatomy (20th ed.). p. 1042.
  2. 1 2 Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. p. 416. ISBN   978-0-7295-3752-0.
  3. ↑ Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 746. ISBN   978-0-7020-7707-4. OCLC   1201341621.{{cite book}}: CS1 maint: location missing publisher (link)


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