Semicanal for auditory tube
Semicanalis tubae auditivae
- Latin synonym: Semicanalis tubae auditoriae; Semicanalis tubae pharyngotympanicae
- Synonym: Canal for auditory tube; Bony auditory tube; Canal for Eustachian tube
- Related terms: Canal for auditory tube
Definition
The semicanal for auditory tube, also known as the semicanalis tubae auditivae, is the lower half of the musculotubal canal that is housed within the temporal bone of the skull. It is designated for the accommodation of the bony part of the auditory (Eustachian) tube. It opens into the anterior wall of the tympanic cavity, immediately below the semicanal for tensor tympani.
The semicanal for auditory tube holds significant anatomical and physiological importance as it forms the bony section of the auditory tube, which primarily aids in equalizing the pressure between the middle ear and the nasopharynx. It maintains the middle ear health by facilitating the drainage and ventilation of this cavity to the throat, thus balancing air pressure and preventing fluid accumulation.
References
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Text written by Muhammad A. Javaid, MD, PhD © 2024 IMAIOS.
Standring, S. (2016). ‘Chapter 37: External and middle ear’ in Gray’s anatomy: the anatomical basis of clinical practice. (41st ed.) New York NY: Elsevier, pp. 634-635.
XR Anatomy (copyright 2023-24). Available at: https://xranatomy.com/musculotubal-canal-of-temporal-bone-2/ (Updated: 10th Mar, 2023; Accessed 7rd April, 2024)
