Temporalis muscle
Updates to Article Attributes
Body
was changed:
The temporalis muscle is one of the muscles of mastication. It is responsible for both closing the mouth and retraction (posterior fibres).
Summary
- origin: temporal fossa between the infratemporal crest and inferior temporal line
- insertion: coronoid process and ramus of mandible
- innervation: deep temporal nerves, branches off the anterior division of the mandibular divison of the trigeminal nerve
- action: elevate and retract the mandible
Gross anatomy
Temporalis is a broad, radiating muscle, situated at the side of the head which arises from the whole of thetemporal fossa (except that portion of it which is formed by the zygomatic bone) and from the deep surface of the temporal fascia. Its fibres converge as they descend, and end in a tendon, which passes deep to the zygomatic arch and is inserted into the medial surface, apex, and anterior border of the coronoid process of the mandible, and the anterior border of the ramus of the mandible nearly as far forward as the last molar tooth.
Blood supply
arterial supply: deepDeep temporal branches of the maxillary artery, and contributions from the middle temporal artery.
Innervation
The muscle is supplied by the deep temporal nerves of the anterior division of the mandibular nerve. It may also receive branches from the middle temporal nerve.
Action
- upper and anterior fibres: close the jaws
- posterior fibres: retract the mandible
- side-to-side movements of the mandible
-<strong>origin:</strong> temporal fossa between the infratemporal crest and inferior temporal line</li>- +<strong>origin:</strong> <a href="/articles/temporal-fossa">temporal fossa</a> between the infratemporal crest and inferior temporal line</li>
-<strong>insertion:</strong> coronoid process and ramus of mandible</li>- +<strong>insertion:</strong> coronoid process and ramus of <a href="/articles/mandible">mandible</a>
- +</li>
-<strong>innervation:</strong> temporal branches of mandibular nerve</li>- +<strong>innervation:</strong> <a href="/articles/deep-temporal-nerves">deep temporal nerves</a>, branches off the <a href="/articles/anterior-division-of-the-mandibular-nerve">anterior division of the mandibular divison</a> of the <a href="/articles/trigeminal-nerve">trigeminal nerve</a>
- +</li>
-</ul><h4>Gross anatomy</h4><p>Temporalis is a broad, radiating muscle, situated at the side of the head which arises from the whole of the<a href="/articles/temporal-bone-1"> </a><a href="/articles/temporal-fossa">temporal fossa</a> (except that portion of it which is formed by the <a href="/articles/zygomatic-bone">zygomatic bone</a>) and from the deep surface of the temporal fascia. Its fibres converge as they descend, and end in a tendon, which passes deep to the zygomatic arch and is inserted into the medial surface, apex, and anterior border of the coronoid process of the <a href="/articles/mandible">mandible</a>, and the anterior border of the ramus of the mandible nearly as far forward as the last molar tooth.</p><h4>Blood supply</h4><p>arterial supply: deep temporal branches of the maxillary artery, contributions from the middle temporal artery</p><h4>Innervation</h4><p>The muscle is supplied by the <a title="deep temporal nerves" href="/articles/deep-temporal-nerves">deep temporal nerves</a> of the <a title="Anterior division of the mandibular nerve" href="/articles/anterior-division-of-the-mandibular-nerve">anterior division</a> of the <a href="/articles/trigeminal-nerve">mandibular nerve</a>. It may also receive branches from the middle temporal nerve.</p><h4>Action</h4><ul>- +</ul><h4>Gross anatomy</h4><p>Temporalis is a broad, radiating muscle, situated at the side of the head which arises from the whole of the<a href="/articles/temporal-bone-1"> </a><a href="/articles/temporal-fossa">temporal fossa</a> (except that portion of it which is formed by the <a href="/articles/zygomatic-bone">zygomatic bone</a>) and from the deep surface of the temporal fascia. Its fibres converge as they descend, and end in a tendon, which passes deep to the zygomatic arch and is inserted into the medial surface, apex, and anterior border of the coronoid process of the <a href="/articles/mandible">mandible</a>, and the anterior border of the ramus of the mandible nearly as far forward as the last molar tooth.</p><h4>Blood supply</h4><p>Deep temporal branches of the <a title="Maxillary artery" href="/articles/maxillary-artery">maxillary artery</a> and contributions from the middle temporal artery.</p><h4>Innervation</h4><p>The muscle is supplied by the <a href="/articles/deep-temporal-nerves">deep temporal nerves</a> of the <a href="/articles/anterior-division-of-the-mandibular-nerve">anterior division</a> of the <a href="/articles/trigeminal-nerve">mandibular nerve</a>. It may also receive branches from the <a href="/articles/deep-temporal-nerves">middle temporal nerve</a>.</p><h4>Action</h4><ul>
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