Temporal muscle
| Temporal muscle | |
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| The Temporalis; the zygomatic arch and Masseter have been removed. | |
| Latin | musculus temporalis |
| Origin | temporal lines on the parietal bone of the skull. |
| Insertion | coronoid process of the mandible. |
| Artery | deep temporal |
| Nerve | mandibular nerve (V3) |
| Actions | elevation and retraction of mandible |
| Antagonist | Platysma muscle |
The temporal muscle is one of the muscles of mastication.
Contents |
[edit] Structure
It arises from the temporal fossa and the deep part of temporal fascia. It passes medial to the zygomatic arch and inserts onto the coronoid process of the mandible.
The temporal muscle is covered by the temporal fascia, also known as the temporal aponeurosis.
The muscle is accessible on the temples, and can be seen and felt contracting while the jaw is clenching and unclenching.
[edit] Innervation
As with the other muscles of mastication, control of the temporal muscle comes from the third (mandibular) branch of the trigeminal nerve. Specifically, the muscle is innervated by the deep temporal nerves.
[edit] Blood supply
The muscle receives its blood supply from the deep temporal arteries which anastomose with the middle temporal artery.
[edit] Actions
Contraction of the temporal muscle retrudes and elevates the mandible. The posterior horizontal fibers retract the mandible while the anterior vertical fibers elevate the mandible.
[edit] Additional images
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Temporal muscle
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Temporal muscle
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Temporal muscle
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Muscles of head and neck
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Frontal bone. Outer surface.
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Sphenoid bone. Anterior and inferior surfaces.
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Mandible. Outer surface. Side view.
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Mandible. Inner surface. Side view.
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Mandibular division of the trifacial nerve.
[edit] External links
- LUC temp
- SUNY Labs 27:04-0100 - "Infratemporal Fossa: The Temporalis Muscle"
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