The Morphological Structure of the Sternohyoid Muscle of a Male

Description

Running vertically in the anterior neck, the paired sternohyoid muscles form a medial component of the infrahyoid strap muscle group. Each belly ascends from the posterior surface of the manubrium sterni and the medial clavicular end, then tracks superiorly to insert on the inferior border of the body of the hyoid bone. Midline separation by the linea alba cervicalis leaves a narrow interval between right and left bellies, while laterally the sternohyoid lies adjacent to sternothyroid inferiorly and overlaps the thyroid cartilage region superficially as it approaches the hyoid. Clear midline anatomy. Functionally, sternohyoid depresses the hyoid after swallowing and stabilizes it during phonation, so its morphology matters when teaching coordinated laryngeal elevation and airway protection. Surgeons encounter this muscle early in midline approaches to the larynx, trachea, and thyroid gland, where it forms part of the strap muscle layer that may be split and retracted to expose the pretracheal fascia and thyroid isthmus. Its relationship to the thyroid cartilage and hyoid also helps explain why postoperative strap muscle scarring can contribute to dysphonia or dysphagia complaints after anterior neck procedures. Anatomy instructors can use this asset in head and neck dissection guides, surface anatomy labs, and chapters on infrahyoid muscles and anterior cervical compartments, where learners often confuse sternohyoid with omohyoid and sternothyroid. It also suits surgical atlases illustrating tracheostomy or thyroidectomy exposure, and patient education materials that need a clean depiction of the strap muscles over the laryngeal framework. Anatomical accuracy verified by SciePro's Medical Advisory Board.