Where is the orbicularis oculi located and what is its function?
The orbicularis oculi is a muscle in the face that closes the eyelids. It arises from the nasal part of the frontal bone, from the frontal process of the maxilla in front of the lacrimal groove, and from the anterior surface and borders of a short fibrous band, the medial palpebral ligament.
Where is the origin of orbicularis oculi?
Orbicularis oculi
| Origin | Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone |
|---|---|
| Innervation | Temporal and zygomatic branches of facial nerve (CN VII) |
| Blood supply | Maxillary, superficial temporal, facial and ophthalmic arteries. |
What is the origin and insertion of the orbicularis oculi?
The orbicularis oculi muscle originates from the front surface of the eye socket rim, which is officially called the orbital margin. From the orbital margin, the muscle extends inward and inserts on to the lateral palpebral raphe, which is a ligament located on the outer part of the eye socket.
Where is the orbicularis oris function?
Located in the face, the orbicularis oris muscle controls movements of the mouth and lips. Specifically, it encircles the mouth, originating in the maxilla (upper jaw and palate) and mandible (lower jaw) bones. The muscle inserts directly into the lips.
What action does the orbicularis oris perform?
The main action caused by the orbicularis oris muscle is the pursing or puckering of the lips. These actions of the lips allow you to kiss someone, play a wind instrument, and whistle your favorite song.
How is orbicularis oculi named?
This is another circular muscle that is found within the lips. It closes the mouth and protrudes the lips. This muscle has a name that associates it with a “horn blower”. Its fibers run horizontal in the cheeks and attach to the orbicularis oris.
Where does the orbicularis oris insertion?
Orbicularis oris muscle
| Origin | Medial aspects of maxilla and mandible, perioral skin and muscles, modiolus |
|---|---|
| Insertion | Skin and mucous membrane of lips |
| Action | Closes mouth, compresses and protrudes lips |
| Innervation | Buccal branch of facial nerve (CN VII) |
What nerve controls the orbicularis oculi?
the facial nerve
The zygomatic branch of the facial nerve traveled obliquely through the anterior cheek and supplied the orbicularis oculi of the lower eyelid and the medial portion of the upper eyelid. Its route was defined as a clinically useful line, the medial orbicularis motor line.
Which nerve supplies the orbicularis oculi?
The zygomatic branch of the facial nerve traveled obliquely through the anterior cheek and supplied the orbicularis oculi of the lower eyelid and the medial portion of the upper eyelid. Its route was defined as a clinically useful line, the medial orbicularis motor line.