subarcuate fossa
{{Short description|Depression in the temporal bone in the skull of mammals}}
{{Infobox bone
| Name = Subarcuate fossa
| Latin = fossa subarcuata ossis temporalis
| Image = Gray138.png
| Caption = Left temporal bone. Inner surface. (Subarcuate fossa not labeled, but aquaeductus vestibuli labeled at lower right.)
| Image2 = Gray193.png
| Caption2 = Base of the skull. Upper surface. (Subarcuate fossa not labeled, but temporal bone is identified in pink, and "Eminentia arcuata" (i.e. arcuate eminence, corresponding to the superior semicircular canal) is labeled.)
}}The subarcuate fossa is a shallow{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |publisher= Elsevier Australia|year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=451}} depression upon the internal surface of the petrous part of the temporal bone{{Cite web |title=Fossa subarcuata |url=https://medical-dictionary.thefreedictionary.com/Fossa+subarcuata |access-date=2023-08-01 |website=TheFreeDictionary.com |language=en}} forming the wall of the posterior cranial fossa. The fossa accommodates the flocculus of the cerebellum. It is situated lateral/posterior to the internal auditory meatus.
Anatomy
The subarcuate fossa is situated posteriorly{{Cite book |last=Standring |first=Susan |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's Anatomy: The Anatomical Basis of Clinical Practice |year=2020 |isbn=978-0-7020-7707-4 |edition=42th |location=New York |pages= |oclc=1201341621}}{{Rp|page=568}} and superiorly{{Rp|page=737}} between the opening of the vestibular aqueduct and opening of internal auditory meatus.{{Rp|page=568, 737}}
The surface of the subarcuate fossa is lined with dura mater and lodges the endolymphatic sac and duct, as well as a minute artery and vein;{{Rp|page=568}} some veins from the mucosa of mastoid antrum enter the cranial cavity at the subarcuate fossa to drain at the superior petrosal sinus - they are remnants of larger subarcuate veins of childhood and represent a possible route of intracranial infectious spread.{{Rp|page=749}}
Other animals
It is extensive in most primates (except for great apes) and nearly all mammals. In these animals, the subarcuate fossa houses a part of the cerebellum, the petrosal lobe.{{cite journal |vauthors=Gannon PJ, Eden AR, Laitman JT |date=Oct 1988 |title=The subarcuate fossa and cerebellum of extant primates: comparative study of a skull-brain interface |journal=Am J Phys Anthropol |volume=77 |issue=2 |pages=143–64 |doi=10.1002/ajpa.1330770202 |pmid=3207165}}{{cite journal |vauthors=Jeffery N, Ryan TM, Spoor F |date=Aug 2008 |title=The primate subarcuate fossa and its relationship to the semicircular canals part II: adult interspecific variation |journal=J Hum Evol |volume=55 |issue=2 |pages=326–39 |doi=10.1016/j.jhevol.2008.02.010 |pmid=18395770}}
References
{{Reflist}}
External links
- {{cite web|url=http://www.tk.de/rochelexikon/pics/s34257.000-2.html|title=Anatomy diagram: 34257.000-2|work= Roche Lexicon - illustrated navigator|publisher= Elsevier|archiveurl=https://web.archive.org/web/20130622050647/http://www.tk.de/rochelexikon/pics/s34257.000-2.html|archivedate=2013-06-22}}
{{Skull}}
{{Portal bar|Anatomy}}
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Category:Bones of the head and neck
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