Digastric (m.digastricus). Anterior belly (venter anterior) starts from the digastric fossa of the lower jaw, back (venter posterior) – from the mastoid notch of temporal bone. Intermediate tendon, the total for the front and rear of the abdomen, a large horn attached to the hyoid bone. From the lower jaw muscle bundles of the anterior abdominal directed downward and backward. When fixing the hyoid bone anterior belly of the lower jaw drops and displaces it backward.  Mandibulohyoid muscle (m.

Chewing muscles (m. masseter) starts from the bottom edge and the inner surface of the zygomatic arch, the anterior slope of the articular tubercle of temporal bone, temporal fascia. It is attached to the chewing surface of the outer branches of lumpy jaw below the notch. From the lower jaw muscle bundles directed upward, forward and outward. Masticatory muscle raises the lower jaw, its surface layer makes the jaw forward, with unilateral reduction – it shifts downward.  Temporalis muscle (m.

Lower jaw (mandibula) – mobile unpaired horseshoe-shaped bone. It consists of two symmetrical halves, each of which has a body and branch. The body of the mandible is presented ground and alveolar part. Body height in the jaw incisors more in the third molars – is considerably less. Its thickness is greatest in the area of molars, the lowest – at the level of small teeth. In the anterior region of the outer surface of the body has a chin mound. Accordingly, the tops of the molars are small chin holes are places where mandibular canal.