Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Elsevier
Publish with us
Orbicularis Oris Muscle
Muscular System

Orbicularis Oris Muscle

Musculus orbicularis oris

Read more

Quick Facts

Origin: Modiolus of angulus oris and vermillion line.

Insertion: Skin and fascia of lips.

Action: Compresses and protrudes lips.

Innervation: Buccal and marginal mandibular branches of facial nerve (CN VII).

Arterial Supply: Superior and inferior labial, infraorbital, and transverse facial arteries.

Complete Anatomy
The world's most advanced 3D anatomy platform
Try it for Free

Origin

The orbicularis oris muscle is an annular muscle consisting of an outer marginal part and an inner labial part. The marginal part of the orbicularis oris muscle arises from the labial sides of the modiolus of angulus oris. The inner labial part of the muscle arises from the vermillion line.

Insertion

The fibers from the marginal part of the orbicularis oris muscle course round into their respective upper and lower labial area, attaching to the surfaces of the maxilla and mandible, as well as to the labial part at the vermillion line. The fibers from the labial part extend into the submucosa of the lips and extend laterally to the base of the modiolus of angulus oris.

Actions

Overall, the orbicularis oris muscle compresses and protrudes the lips (Netter, 2011). This action is used when pursing the lips and whistling.

List of Clinical Correlates

- Bell’s palsy

References

Netter, F. H. (2011) Atlas of Human Anatomy. Netter Basic Science Series: Saunders/Elsevier.

Learn more about this topic from other Elsevier products

Orbicularis Oris Muscle

ScienceDirect image

3 The orbicularis oris muscle forms the muscular framework of the lips and contraction of this muscle during swallowing ensures an adequate seal to prevent material from leaking from the oral cavity.

Explore on ScienceDirect(opens in new tab/window)

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy