Zygomaticus major muscle
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.
| 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 |
| Anatomical terms of muscle | |
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. Usually a single unit, Dimples are caused by variations in form.[2][3] It is thought that dimples are caused by bifid zygomaticus major muscle.[4]
Image
Position of zygomaticus major muscle. Animation.
Muscles of the head, face, and neck. Zygomaticus major shown in red.
Dimple
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References
- Stel, Mariëlle; van Dijk, Eric; Olivier, Einav (2009). "You Want to Know the Truth? Then Don't Mimic!". Psychological Science. 20 (6): 694. doi:10.1111/j.1467-9280.2009.02350.x.
- "Dimple Creation – Cute as a button, who pays for a deformity?".
- "Zygomaticus Major Muscle Function, Origin & Anatomy".
- Pessa, Joel E.; Zadoo, Vikram P.; Garza, Peter A.; Adrian, Erle K.; Dewitt, Adriane I.; Garza, Jaime R. (1998). "Double or bifid zygomaticus major muscle: Anatomy, incidence, and clinical correlation". Clinical Anatomy. 11 (5): 310–313. doi:10.1002/(SICI)1098-2353(1998)11:5<310::AID-CA3>3.0.CO;2-T. PMID 9725574.
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