Stapedius muscle
- Philips Australia, Paid speaker at Philips Spectral CT events (ongoing)
Updates to Article Attributes
The stapedius muscle is the tiny slender muscle in the middle ear that attaches to the posterior aspect of the neck of the stapes, which when contracted dampensdampens excessive sound vibrations passed to the cochlea via the oval window. The
Gross anatomy
The muscle is anchored within the petrous temporal bone and. Its tendon emerges anteriorly into the mesotympanum
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).
-<p>The<strong> stapedius muscle</strong> is the tiny muscle in the <a href="/articles/middle-ear">middle ear</a> that attaches to the posterior aspect of the neck of the <a href="/articles/stapes">stapes</a>, which when contracted dampens vibrations passed to the <a href="/articles/cochlea">cochlea</a> via the <a href="/articles/oval-window">oval window</a>. The muscle is anchored within the <a href="/articles/temporal-bone-1">petrous temporal bone</a> and emerges anteriorly into the <a href="/articles/mesotympanum">mesotympanum</a> from the hollow of the <a href="/articles/pyramidal-process">pyramidal process</a>. It is supplied by a small branch from the <a href="/articles/facial-nerve">facial nerve</a>.</p><h4>Related pathology</h4><p>Paralysis of this muscle leads to a hypersensitivity to loud noises (<a href="/articles/hyperacusis">hyperacusis</a>).</p>- +<p>The<strong> stapedius muscle</strong> is the tiny slender muscle in the <a href="/articles/middle-ear">middle ear</a> that attaches to the <a href="/articles/stapes">stapes</a>, which dampens excessive sound vibrations passed to the <a href="/articles/cochlea">cochlea</a> via the <a href="/articles/oval-window">oval window</a>. </p><h4>Gross anatomy</h4><p>The muscle is anchored within the <a href="/articles/temporal-bone-1">petrous temporal bone</a>. Its tendon emerges anteriorly from the hollow of the conical <a href="/articles/pyramidal-process">pyramidal process</a> to enter the <a href="/articles/mesotympanum">mesotympanum</a>. It courses anteriorly to attach to the posterior aspect of the neck of the stapes.</p><h5>Blood supply</h5><p>The stapedius is supplied by multiple small branches from the:</p><ul>
- +<li><p><a href="/articles/posterior-auricular-artery" title="Posterior auricular artery">posterior auricular artery</a></p></li>
- +<li><p><a href="/articles/anterior-tympanic-artery" title="Anterior tympanic artery">anterior tympanic artery</a></p></li>
- +<li><p><a href="/articles/middle-meningeal-artery" title="Middle meningeal artery">middle meningeal artery</a></p></li>
- +</ul><h5>Innervation</h5><p>The muscle is supplied by a small branch from the <a href="/articles/facial-nerve">facial nerve</a>, which arises from the facial canal.</p><h5>Action</h5><p>When contracted, stapedius dampens sound oscillations passing through the <a href="/articles/oval-window">oval window</a> to the <a href="/articles/cochlea">cochlea</a>. </p><h4>Related pathology</h4><p>Paralysis of this muscle leads to a hypersensitivity to loud noises (<a href="/articles/hyperacusis">hyperacusis</a>).</p>
References changed:
- 3. Susan Standring. Gray's Anatomy. <a href="https://books.google.co.uk/books?vid=ISBN9780702052309">ISBN: 9780702052309</a><span class="ref_v4"></span> https://drive.google.com/file/d/0BwQj92tZP0i3bEk5YmR0LUI1bFE/view?usp=sharing
- 4. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. <a href="http://books.google.com/books?vid=ISBN1451119453">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/1451119453">Find it at Amazon</a><span class="auto"></span>
Image 1 Annotated image (Axial bone window) ( create )
Unable to process the form. Check for errors and try again.