What Action Does The Orbicularis Oris Muscle Allow?. Orbicularis Oris Muscle, Also Known As Musculus Orbicularis Oris Is A Complex, Multi-Layered Muscle Which Attaches Through A Thin, Superficial Musculoaponeurotic System To The Dermis Of The Upper Lip And Lower Lip And Serves As An Attachment Site For Many Other Facial Muscles Around The Oral Region.

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action anatomical anatomy dermis facial intercostal internal lip muscle muscles muscular musculoaponeurotic oral orbicularis organ oris sphincter superficial