depressor labii inferioris (muscle)
Definition: facial muscle of mouth; origin, anterior portion of base of mandible; insertion, interdigitates with fibers of orbicularis oris musculus to reach skin of lower lip; action, depresses lower lip; nerve supply, facial.
Synonym(s): musculus depressor labii inferiorisTA, depressor muscle of lower lip, musculus quadratus labii inferioris, musculus quadratus menti
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