Fig. 3

Normal MRI anatomy of the oral cavity. a A coronal T2-weighted image at the anterior part shows the mylohyoid muscle (arrow), separating the sublingual space superiorly including the sublingual gland (black asterisk) and the submandibular space inferiorly. Medially, and superior to the mylohyoid muscle, are the geniohyoid muscles (dotted arrow) and genioglossus muscles (superior to the geniohyoid muscles). Inferiorly, images show the anterior belly of the digastric muscle (white asterisk), and laterally, the buccinator muscle (dashed arrow). b A coronal T2-weighted image at a more posterior part shows the mylohyoid muscles (arrow) and the hyoglossus muscles more medially (dashed arrow), and the masseter muscle laterally in the masticator space (dotted arrow). Submandibular glands (asterisk) are shown below the mylohyoid muscle