Hyoglossus Muscle Beneath the Skin

Description

Lateral profile anatomy of the male head and neck exposes the hyoglossus as a quadrangular sheet ascending from the body and greater cornu of the hyoid bone to the lateral margin of the tongue. Superiorly, its fibers blend with intrinsic tongue musculature, while inferiorly it sits deep to the mandibular ramus and adjacent suprahyoid tissues. Medially, the hyoglossus lies against the genioglossus; laterally it relates to the mylohyoid and the submandibular space. Nearby bony landmarks in this cutaway style view include the maxilla and mandible with dentition, the temporal region, and the upper cervical vertebrae. Clinical anatomy lives on the surface of the hyoglossus. The hypoglossal nerve (CN XII) and lingual nerve typically course superficial to it, while the lingual artery runs deep, making the muscle a practical landmark when controlling hemorrhage from the floor of mouth or during partial glossectomy and transoral approaches. Injury here is not subtle. Tongue weakness with deviation and dysarthria often reflects hypoglossal neuropraxia in the same surgical corridor, and the proximity to Wharton duct and the submandibular gland explains why infections, sialolithiasis workups, and gland excisions demand a clear mental map of this layer. Use this illustration for teaching tongue depressor mechanics in head and neck anatomy, dental and oral surgery modules, or speech and swallowing coursework that ties hyoglossus action to bolus propulsion and airway protection. It also fits ENT and maxillofacial operative texts discussing submandibular triangle dissection, ranula management, and safe planes around the lingual artery. Anatomical accuracy verified by SciePro's Medical Advisory Board.