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Medical Term:

depressor anguli oris (muscle)


Definition: facial muscle of mouth; origin, anterolateral base 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 orisTA, musculus triangularis2TA, triangular muscle2TA, musculus triangularis labii inferioris

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