The mentalis (also mentalis muscle, latin: musculus mentalis) is a facial muscle located in the chin area that originates from the mental fossa and inserts into the skin of the chin.
The mentalis originates from the incisive fossa on the alveolar process of the mandible in the region of lateral incisor.
The fibers of the mentalis radiate and insert into the skin of the chin.
Upon activation the mentalis muscle produces small dimples in the chin.
Contractions of the muscle can produce facial expression presenting doubt and indecision.
The mentalis is innervated by the marginal mandibular branch of the facial nerve (CN VII).