orbicularis orismedical dictionary

<anatomy, muscle> 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, fibres surround mouth between skin and mucous membrane of lips and cheeks, and are blended with other muscles; action, closes lips; nerve supply, facial.

Synonyms: musculus orbicularis oris, musculus sphincter oris, orbicular muscle of mouth, sphincter oris.

(05 Mar 2000)