Sternothyroid - Podcast Version TeachMeAnatomy 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The sternothyroid muscle is an infrahyoid muscle of the neck. It is a wide muscle, located underneath the sternohyoid in the deep plane of the neck. Attachments: Arises from the manubrium of the sternum and attaches to the thyroid cartilage. Actions: Depresses the thyroid cartilage. Innervation: Anterior rami of C1-C3, carried by a branch of the ansa cervicalis. Blood Supply: Superior thyroid artery (branch of the external carotid artery) and inferior thyroid artery (branch of the thyrocervical trunk). By TeachMeSeries Ltd (2025) Fig 1- Anterior view of the infrahyoid muscles of the neck. By TeachMeSeries Ltd (2025) Fig 2Lateral view of the infrahyoid muscles of the neck. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Pro Feature - Dissection Atlas The subclavian and external carotid arteries. Note the location and branching pattern of the thyrocervical trunk. The subclavian and external carotid arteries. Note the location and branching pattern of the thyrocervical trunk. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Rate This Article