Hyoglossus Muscle Under the Skin, Inferior View

Description

Rising from the superior border of the hyoid bone, the hyoglossus appears as a flattened quadrilateral sheet ascending into the lateral aspect of the tongue, positioned deep to the oral mucosa and superficial to the intrinsic tongue musculature. From an inferior (submental) vantage, its fibers run superiorly and slightly anteriorly toward the tongue body, lying lateral to genioglossus and medial to the styloglossus as the floor of mouth opens toward the oropharynx. Adjacent midline structures such as the hyoid and tongue base orient the viewer, while the surrounding upper airway architecture frames the muscle in context. Orientation is unambiguous. Clinically, this angle clarifies the layered anatomy that surgeons and anesthetists rely on when working around the tongue base and supraglottis: the hyoglossus forms a muscular boundary to the sublingual space and sits in the neighborhood of the lingual artery and hypoglossal nerve (CN XII), structures at risk during submandibular gland procedures, tongue base surgery, or deep floor-of-mouth infection drainage. Lingual artery hemorrhage and postoperative tongue weakness are not academic problems here. When teaching tongue depression and retraction mechanics, the hyoglossus is best understood in relation to its antagonists and partners, including genioglossus and the suprahyoid sling, rather than as an isolated red muscle. Anatomy faculty can drop this illustration directly into head and neck modules covering the extrinsic tongue muscles, floor of mouth spaces, and airway landmarks for intubation or supraglottic device placement, and authors will find it fits cleanly into ENT, oral and maxillofacial, and anesthesia texts discussing tongue base exposure and neurovascular risk. It also supports clinical patient-education graphics explaining hypoglossal nerve injury patterns and tongue movement deficits. Anatomical accuracy verified by SciePro's Medical Advisory Board.