Zygomaticus major muscle
| Zygomaticus major | |
|---|---|
 Muscles of the head, face, and neck. Zygomaticus major shown in red. | |
| Details | |
| Origin | anterior of zygomatic |
| Insertion | modiolus of mouth |
| Artery | facial artery |
| Nerve | zygomatic and buccal branches of the facial nerve |
| Actions | draws angle of mouth upward and laterally |
| Identifiers | |
| Latin | musculus zygomaticus major |
| TA | A04.1.03.029 |
| FMA | 46810 |
The zygomaticus major is a muscle of the human body. It is a muscle of facial expression which draws the angle of the mouth superiorly and posteriorly to allow one to smile.[1] Like all muscles of facial expression, the zygomatic major is innervated by the facial nerve (the seventh cranial nerve), more specifically, the buccal and zygomatic branches of the facial nerve.
Structure
The zygomaticus extends from each zygomatic arch (cheekbone) to the corners of the mouth.
Function
It raises the corners of the mouth when a person smiles. Dimples may be caused by variations in the structure of this muscle.[2]
Image
Position of zygomaticus major muscle. Animation.
Muscles of the head, face, and neck. Zygomaticus major shown in red.
See also
This article uses anatomical terminology; for an overview, see Anatomical terminology.
References
- ↑ Stel, Mariëlle; van Dijk, Eric; Olivier, Einav (2009). "You Want to Know the Truth? Then Don't Mimic!". Psychological Science. 20 (6): 694.
- ↑ "Dimple Creation – Cute as a button, who pays for a deformity?".
External links
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Wikimedia Commons has media related to Zygomaticus major muscles. |
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