Mentalis

  • The mentalis (also mentalis muscle, latin: musculus mentalis) is a facial muscle located in the chin area.

    Origin

    The mentalis originates from the incisive fossa on the alveolar process of the mandible in the region of lateral incisor.

    Insertion

    The fibers of the mentalis radiate and insert into the skin of the chin.

    Action

    Upon activation the mentalis muscle produces small dimples in the chin.

    Contractions of the muscle can produce facial expression presenting doubt and indecision.

    Innervation

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

    Blood supply

    The mentalis receives blood supply from the inferior labial branch of the facial artery and the mental branch of the maxillary artery.