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Zygomaticus minor

The zygomaticus minor (also zygomaticus minor muscle, minor zygomatic muscle, latin: musculus zygomaticus minor) is a facial muscle lying medially to the zygomaticus major and belonging to elevators of the lip.

Origin

The zygomaticus minor originates from the lateral surface of the zygomatic bone. Its origin site is located immediately behind the zygomaticomaxillary structure.

Insertion

The zygomaticus minor inserts into the skin of the lateral part of the upper lip and extends to the nasolabial sulcus.

Action

Upon activation the zygomaticus minor pulls the upper lip backward, upward and outward, and also aids in deepening and elevating the nasolabial sulcus.

Innervation

The zygomaticus minor is innervated by the buccal branch of the facial nerve (CN VII).

Blood supply

Like the zygomaticus major, the zygomaticus minor is also supplied by the superior labial branch of the facial artery.