Zygomaticus major muscle
Muscles of the head, face, and neck. Zygomaticus major shown in red.
|Latin||musculus zygomaticus major|
|Origin||anterior of zygomatic|
|Insertion||modiolus of mouth|
|zygomatic and buccal branches of the facial nerve|
|Actions||draws angle of mouth upward and laterally|
|Anatomical terms of muscle|
||This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (May 2015)|
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 (smile). 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.
The zygomaticus extends from each zygomatic arch (cheekbone) to the corners of the mouth.
It raises the corners of the mouth when a person smiles. Dimples may be caused by variations in the structure of this muscle.
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