Orbicularis Oculi - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The orbicularis oculi is an orbital muscle of facial expression. It plays a key role in closing the eyelids and thus protecting the cornea from damage. Attachments – Originates from the medial orbital margin, the medial palpebral ligament, and the lacrimal bone. It inserts onto the skin around the margin of the orbit as well as the tarsal plates of the eyelid. Actions: Palpebral part – gently closes the eyelids. Lacrimal part – involved in the drainage of tears. Orbital part – tightly closes the eyelids. Innervation – Temporal and zygomatic branches of the facial nerve. Blood supply – Branches of the maxillary, superficial temporal, facial and ophthalmic arteries. By TeachMeSeries Ltd (2026) Fig 1The two orbital muscles of facial expression. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Pro Feature - Dissection Atlas Prosection of the face, demonstrating the anterior facial muscles. Prosection of the face, demonstrating the anterior facial muscles. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Frequent questions What is the function of the orbicularis oculi muscle? The orbicularis oculi muscle is responsible for closing the eyelids, which protects the cornea from potential damage. It facilitates both gentle and tight closure of the eyelids depending on the part of the muscle engaged. Where does the orbicularis oculi muscle originate and insert? This muscle originates from the medial orbital margin, medial palpebral ligament, and lacrimal bone, inserting onto the skin surrounding the orbit and the tarsal plates of the eyelids. What are the different parts of the orbicularis oculi, and what do they do? The orbicularis oculi consists of three parts: the palpebral part gently closes the eyelids, the lacrimal part aids in tear drainage, and the orbital part tightly closes the eyelids. Which nerves innervate the orbicularis oculi muscle? The muscle is innervated by the temporal and zygomatic branches of the facial nerve, enabling its function in facial expression and eyelid movement. What is the blood supply to the orbicularis oculi muscle? The orbicularis oculi receives blood from branches of the maxillary, superficial temporal, facial, and ophthalmic arteries, ensuring it has adequate vascular support for its functions. Rate This Article