orbicularis oris muscle


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or·bi·cu·la·ris o·ris mus·cle

(ōr-bik'yū-lā'ris ō'ris mŭs'ĕl)
Origin, by nasolabial band from septum of the nose, by superior incisive bundle from incisor fossa of maxilla, by inferior incisive bundle from lower jaw each side of symphysis; insertion, fibers surround mouth between skin and mucous membrane of lips and cheeks, and are blended with other muscles; action, closes lips; nerve supply, facial.
Synonym(s): musculus orbicularis oris [TA] .

orbicularis oris muscle

Facial muscle. Origin: adjacent facial muscles that surround mouth. Insertion: into itself and skin of lips while encircling mouth. Nerve: facial (CN VII). Action: closes and purses lips.
See: face and headfor illus.
See also: muscle

or·bi·cu·la·ris o·ris mus·cle

(ōr-bik'yū-lā'ris ō'ris mŭs'ĕl)
Origin, by nasolabial band from septum of the nose, by superior incisive bundle from incisor fossa of maxilla, by inferior incisive bundle from lower jaw each side of symphysis; insertion, fibers surround mouth between skin and mucous membrane of lips and cheeks, and are blended with other muscles; action, closes lips; nerve supply, facial.
Synonym(s): musculus orbicularis oris [TA] .

orbicularis oris muscle

see Table 13.1A.
References in periodicals archive ?
However, the orbicularis oris muscle is not subject to fatty or fibroblastic degeneration, but shows signs of atrophy.
If a functional modification does affect the orofacial muscles, [6,7,8] then there is a great interest in evaluating the superior orbicularis oris muscle, which represents the upper lip.
MOUTH LIFT THIS works the orbicularis oris muscle which encircles the mouth, as well as the muscles in the cheeks, around the eyes, and the forehead.