Palpebral part of orbicularis oculi

The palpebral part of the orbicularis oculi (Latin: pars palpebralis musculi orbicularis oculi) is one of the orbicularis oculi muscle parts. It lies within the upper and lower eyelids. The orbicularis oculi muscle is classified as the circumorbital and palpebral facial muscle.

Origin

The palpebral part of the orbicularis oculi arises from the medial palpebral ligament.

Insertion

The fibers of the palpebral part insert into the lateral palpebral ligament.

Action

Upon activation, the palpebral part of the orbicularis oculi closes the eyelids.

Innervation

The palpebral part of the orbicularis oculi is innervated by the temporal and zygomatic branches of the facial nerve (CN VII).

Blood supply

The palpebral part of the orbicularis oculi muscle is supplied by the branches of the facial, superficial temporal and ophthalmic arteries.