Depressor labii inferioris muscle (anatomy)
Depressor labii inferioris is one of the muscles of facial expression. On each side, it originates from the external surface of the mandible along the oblique line anteriorly. It inserts into the skin of the lower lip.
Its action is to draw the lower lip inferolaterally.
Depressor labii inferioris is innervated by the mandibular branch of the facial nerve (VII).
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