FIG 1. Normal postcontrast axial CT images through the oral cavity. B is caudal to image A. The classic anatomy of the mylohyoid muscle (A, large black arrows: B, black diamonds) is seen forming a continuous muscular barrier separating the deep sublingual space from the superficial SMS. Running parallel to the posterior aspect of the mylohyoid muscle is the hyoglossus muscle (small black arrows). On either side of the fibro-fatty lingual septum (double arrow) are the genioglossus muscles cranially, and the geniohyoid muscles caudally. Caudally, the anterior belly of the diagastric muscle (white arrows) blends with the superficial margin of the mylohyoid muscle. Asterisks signify the submandibular glands (18)