Stapedius muscle
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At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosuresAt the time the article was last revised Craig Hacking had the following disclosures:
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These were assessed during peer review and were determined to not be relevant to the changes that were made.
View Craig Hacking's current disclosures- Stapedius muscles
The stapedius muscle is the tiny slender muscle in the middle ear that attaches to the stapes, which dampens excessive sound vibrations passed to the cochlea via the oval window.
Gross anatomy
The muscle is anchored within the petrous temporal bone. Its tendon emerges anteriorly from the hollow of the conical pyramidal process to enter the mesotympanum. It courses anteriorly to attach to the posterior aspect of the neck of the stapes.
Blood supply
The stapedius is supplied by multiple small branches from the:
Innervation
The muscle is supplied by a small branch from the facial nerve, which arises from the facial canal.
Action
When contracted, stapedius dampens sound oscillations passing through the oval window to the cochlea.
Related pathology
Paralysis of this muscle leads to a hypersensitivity to loud noises (hyperacusis).
References
- 1. Chummy S. Sinnatamby, R. J. Last. Last's Anatomy. ISBN: 9780443056116
- 2. Carmine D. Clemente. Anatomy. ISBN: 9781582558899
- 3. Susan Standring. Gray's Anatomy. ISBN: 9780702052309 https://drive.google.com/file/d/0BwQj92tZP0i3bEk5YmR0LUI1bFE/view?usp=sharing
- 4. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. Read it at Google Books - Find it at Amazon
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