depressor anguli oris muscle

(redirected from Triangularis muscle)

de·pres·sor an·gu·li o·ris mus·cle

(dĕ-pres'ŏr ang'yū-lī ōr'is mŭs'ĕl)
Origin, lower border of mandible anteriorly; insertion, blends with other muscles in lower lip near angle of mouth; action, pulls down corners of mouth; nerve supply, facial.
Synonym(s): musculus depressor anguli oris [TA] , triangular muscle (2) .
References in periodicals archive ?
1) The marginal mandibular branch of the facial nerve passes forward beneath the platysma and triangularis muscles.