depressor labii inferioris muscle

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de·pres·sor la·bi·i in·fe·ri·o·ris mus·cle

(dĕ-pres'ōr lā'bē-ī in-fēr'ē-ōr'is mŭs'ĕl)
Origin, anterior portion of lower border of mandible; insertion, orbicularis oris musculus and skin of lower lip; action, depresses lower lip; nerve supply, facial.
Synonym(s): musculus depressor labii inferioris [TA] .
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References in periodicals archive ?
Resection of the depressor labii inferioris muscle on the contralateral side can improve facial symmetry at rest and with smiling.