Mylohyoid Muscle, Superior View

Description

Oral cavity anatomy is rendered from a superior approach to the floor of mouth, centering on the paired mylohyoid muscles as a diaphragmatic sling spanning the inner aspect of the mandible. Fibers arise from the mylohyoid line and course inferomedially to meet at the median raphe, with the posterior portions inserting on the body of the hyoid bone inferiorly. Superior to the mylohyoid, the genioglossus sits in the midline, and the mandibular alveolar arch with dentition frames the lateral margins of the field. Understanding the mylohyoid from above matters because it defines the functional and surgical boundary between the sublingual space (superior) and the submandibular space (inferior), a distinction that dictates how odontogenic infections track around the mandible. When a mandibular molar root apex lies inferior to the mylohyoid line, pus tends to decompress into the submandibular space, while apices superior to that line more often drain into the sublingual compartment, displacing the tongue. A thin muscle. A high stakes barrier. This relationship is also central in transoral approaches to ranula excision and in interpreting floor-of-mouth swelling on CT or MRI. Use this artwork in head and neck anatomy teaching (suprahyoid musculature, floor of mouth compartments), dental and OMFS course materials on deep neck space infection pathways, and ENT or radiology publications illustrating sublingual versus submandibular disease spread and surgical corridors along the mandible and hyoid. Anatomical accuracy verified by SciePro's Medical Advisory Board.