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Zygomaticus Major Muscle
Muscular System

Zygomaticus Major Muscle

Musculus zygomaticus major

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Quick Facts

Origin: Zygomatic bone.

Insertion: Angle of mouth.

Action: Elevates angle of mouth.

Innervation: Zygomatic and buccal branches of facial nerve (CN VII).

Arterial Supply: Superior labial artery.

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The zygomaticus major muscle originates from the zygomatic bone at the zygomaticotemporal suture.


The fibers of the zygomaticus major muscle blend with the levator anguli oris and the orbicularis oris muscle at the corner of the mouth.

Key Features & Anatomical Relations

The zygomaticus major muscle sits lateral the zygomaticus minor muscle.


The zygomaticus major muscle elevates the angle of the mouth and also draws it laterally. This action is used when laughing (Standring, 2016).

List of Clinical Correlates

- Bell’s palsy


Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.

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