Orbital part of orbicularis oculi

The orbital part of the orbicularis oculi (Latin: pars orbitalis musculi orbicularis oculi) is one of the orbicularis oculi muscle parts. It lies circularly around the opening of the orbit. The orbicularis oculi muscle is classified as the circumorbital and palpebral facial muscle.

All facial muscles with orbital part of orbitularis oculi highlighted
Orbital part of orbicularis oculi by Anatomy Next
Orbital part of orbicularis oculi
OriginMedial palpebral ligament
InsertionFibers go around orbital opening and insert into origin site
ActionLifts cheek, narrows space between both eyelids
InnervationTemporal and zygomatic branches of facial nerve (CN VII)
Blood supply Branches of facial, superficial temporal and ophthalmic arteries

Origin

The orbital part of the orbicularis oculi originates from the medial palpebral ligament.

Insertion

Fibers of this orbicularis oculi muscle part run around the orbital opening and insert into the origin site.

Origin and insertion of orbicularis oculi muscle
Origin and insertion of orbicularis oculi by Anatomy Next

Action

Contractions of the orbital part of the orbicularis oculi lift the cheek and narrow the space between the eyelids (close the eyelids).

Action of orbicularis oculi muscle
Action of orbicularis oculi by Anatomy Next

Innervation

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

Blood supply

The orbital part receives arterial blood supply from the branches of the facial, superficial temporal and ophthalmic arteries.