attached to surrounds muscles innervated by the facial nerve modiolus orbicularis oris muscle The orbicularis oris is a superficial facial muscle with fibers that encircle the opening of the oral cavity that attaches to the maxilla, mandible, skin and modiolus, and that participates in oral/pharyngeal behaviors, and is innervated by the facial nerve (CN VII). Burrows et al., 2011; Diogo et al., 2009 Ready for review. http://purl.obolibrary.org/obo/UBERON_0010933 http://www.feedexp.org/wiki/Mammalian_Muscle_Ontology_Workshop skin of body oral opening mandible bone maxilla bone