Depressor anguli oris

  • The depressor anguli oris (also depressor anguli oris muscle, latin: musculus depressor anguli oris) is a facial muscle responsible for pulling the angle of the mouth downward.

    The depressor anguli oris originates from the base of mandible, specifically, from the blique line running posterior and superior from each mental tubercle. The depressor anguli oris inserts into the skin of the angle of the mouth.

    The main function of the depressor anguli oris is pulling the angle of the mouth downward. Contractions of the depressor anguli oris muscle produce facial expression of sadness.

    The depressor anguli oris is innervated by the marginal mandibular branch of facial nerve (CN VII).