Omohyoid Muscle, Anterior View

Description

Running obliquely across the anterolateral neck, the omohyoid is presented with its inferior belly arising from the superior border of the scapula near the suprascapular notch and coursing superomedially to an intermediate tendon. A fascial sling anchors that tendon to the clavicle and deep cervical fascia, after which the superior belly continues toward the inferior border of the hyoid bone, lying deep to the platysma and investing layer of cervical fascia. Medially, the strap muscle compartment is suggested by neighboring infrahyoid muscles such as sternohyoid and sternothyroid, while laterally the omohyoid approaches the anterior margin of the sternocleidomastoid and the carotid sheath region. Functionally, the omohyoid depresses and stabilizes the hyoid during swallowing and phonation, but its teaching value comes from its fascia and its relationship to surgical planes. The intermediate tendon and its fascial sling tension the pretracheal fascia and can narrow the internal jugular vein, a relationship often discussed when planning low neck venous access, interpreting venous caliber on ultrasound, or tracing the superior belly as a landmark during level III and IV neck dissection. Small but meaningful. For instruction, this anterior female neck dissection style view works well in head and neck anatomy labs, ENT and endocrine surgery atlases (thyroidectomy and lateral neck approaches), and anesthesia education focused on central venous catheter placement landmarks. Medical publishers also use it to explain the ansa cervicalis supply to infrahyoid muscles and how the omohyoid partitions cervical triangles for exam and imaging reports. Anatomical accuracy verified by SciePro's Medical Advisory Board.