Zygomaticus major muscle

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Zygomaticus major
Sobo 1909 260 - Zygomaticus major muscle.png
Muscles of the head, face, and neck. Zygomaticus major shown in red.
Latin musculus zygomaticus major
Gray's p.383
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
TA A04.1.03.029
FMA FMA:46810
Anatomical terms of 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 (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.

Structure[edit]

The zygomaticus extends from each zygomatic arch (cheekbone) to the corners of the mouth.

Function[edit]

It raises the corners of the mouth when a person smiles. Dimples may be caused by variations in the structure of this muscle.

Image[edit]

See also[edit]

This article uses anatomical terminology; for an overview, see anatomical terminology.

External links[edit]