Hypotympanum
Last revised by Craig Hacking on 6 Nov 2018
Citation, DOI, disclosures and article data
Citation:
Bell D, Hacking C, Hypotympanum. Reference article, Radiopaedia.org (Accessed on 13 Oct 2024) https://doi.org/10.53347/rID-57540
rID:
57540
Article created:
31 Dec 2017,
Daniel J Bell ◉
Disclosures:
At the time the article was created Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Last revised:
6 Nov 2018,
Craig Hacking ◉
Disclosures:
At the time the article was last revised Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Revisions:
2 times, by
2 contributors -
see full revision history and disclosures
Systems:
Sections:
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Synonyms:
- Floor of the tympanic cavity
The hypotympanum refers to the portion of the tympanic cavity lying inferior to the level of the inferior margin of the external acoustic canal (EAC).
Gross anatomy
The hypotympanum is the smallest of the three compartments that make up the tympanic cavity and is a shallow depression in the floor of the middle ear. It is separated from the mesotympanum by an axial plane drawn between the inferior cochlear promontory and the tympanic annulus. Anteriorly is the opening into the Eustachian tube which passes anteromedially to the nasopharynx.
References
- 1. Paul Butler, Adam W. M. Mitchell. Applied Radiological Anatomy. ISBN: 9780521481106
- 2. Marc Lemmerling, Spyros S. Kollias. Radiology of the Petrous Bone. ISBN: 9783642188367
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