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by | Mar 16, 2018 | Hosta

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The subarcuate fossa is a shallow[1] depression upon the internal surface of the petrous part of the temporal bone[2] 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.[1]

Anatomy

The subarcuate fossa is situated posteriorly[3]: 568  and superiorly[3]: 737  between the opening of the vestibular aqueduct and opening of internal auditory meatus.[3]: 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;[3]: 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.[3]: 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.[4][5]

References

  1. ^ a b Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). Elsevier Australia. p. 451. ISBN 978-0-7295-3752-0.
  2. ^ "Fossa subarcuata". TheFreeDictionary.com. Retrieved 2023-08-01.
  3. ^ a b c d e Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)
  4. ^ Gannon PJ, Eden AR, Laitman JT (Oct 1988). "The subarcuate fossa and cerebellum of extant primates: comparative study of a skull-brain interface". Am J Phys Anthropol. 77 (2): 143–64. doi:10.1002/ajpa.1330770202. PMID 3207165.
  5. ^ Jeffery N, Ryan TM, Spoor F (Aug 2008). "The primate subarcuate fossa and its relationship to the semicircular canals part II: adult interspecific variation". J Hum Evol. 55 (2): 326–39. doi:10.1016/j.jhevol.2008.02.010. PMID 18395770.

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