Dilator naris anterior

  • The dilator naris anterior (also dilator naris anterior muscle, latin: musculus dilator naris anterior) is a muscle of the nose that participates in widening the nostril.

    The dilator naris anterior originates from the upper lateral cartilage and the alar portion of the nasalis. It inserts into the caudal margin of the lateral crura and the lateral alar skin.

    Upon contraction the dilator naris anterior dilates the nostril.

    The dilator naris anterior is innervated by the buccal branch of the facial nerve (CN VII).

    Sometimes the dilator naris anterior along with the dilator naris posterior are referred to as parts of the nasalis muscle.