The muscular floor of the oral cavity consists of the Mylohyoid, Geniohyoid, Digastric, and Stylohyoid. The mylohyoid arises bilaterally from the mandible and presents a midline raphe. The geniohyoid, lying above the mylohyoid, attaches to the mental spine of the mandible and the body of the hyoid bone. The digastric has two bellies with an intermediate tendon attached to the hyoid bone. The posterior belly arises from the mastoid groove of the temporal bone. The anterior belly arises from the intermediate tendon and attaches to the mandible. The stylohyoid divides and embraces the intermediate tendon of the digastric.