Cochlear aqueduct
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At the time the article was created Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosuresAt the time the article was last revised Frank Gaillard had no financial relationships to ineligible companies to disclose.
View Frank Gaillard's current disclosures- Cochlear canaliculus
- Aqueduct of the cochlea
The cochlear aqueduct or canaliculus is a small canal in the bony labyrinth of the petrous temporal bone that contains the perilymphatic duct, which drains perilymph into the cerebrospinal fluid of the posterior cranial fossa subarachnoid space. It runs inferior and parallel to the internal auditory canal.
The lateral end arises from the scala tympani at the basal turn of the cochlea. It then courses through the otic capsule and petrous apex. These parts are very small in caliber and not visualized on CT in most patients 4.
The medial end, which is funnel-shaped and visible on CT in the vast majority of patients, opens at the roof (pyramidal fossa) of the jugular foramen pars nervosa 4. Within the pars nervosa, it is seen superior to the petrosal fossula.
Related pathology
Enlarged cochlear aqueduct is a controversial entity with few reported cases with attributable inner ear dysfunction 4.
References
- 1. Last's anatomy, regional and applied. Churchill Livingstone. ISBN:044304662X. Read it at Google Books - Find it at Amazon
- 2. Susan Standring. Gray's Anatomy. ISBN: 9780702052309
- 3. Butler P, Mitchell A, Healy JC. Applied Radiological Anatomy. Cambridge University Press. (2012) ISBN:0521766664. Read it at Google Books - Find it at Amazon
- 4. Mukherji SK, Baggett HC, Alley J, Carrasco VH. Enlarged cochlear aqueduct. (1998) AJNR. American journal of neuroradiology. 19 (2): 330-2. Pubmed
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