MuscleFacial expression
Orbicularis oris
Latin: M. orbicularis oris
Location: Face
View the orbicularis oris in 3DOrigin
Fibres from the modiolus, maxilla and mandible encircling the mouth.
Insertion
Mucosa and skin of the lips in a sphincteric loop.
Action
Closes and protrudes the lips — whistling, kissing, sucking and speech articulation.
Nerve supply
Facial nerve (CN VII) — buccal branches.
Blood supply
Facial and labial arteries.
Clinical relevance
Cleft-lip repair re-approximates its orbicular ring; facial palsy drools and slurs through its weakness.
Educational anatomy reference, not medical advice. About this content.