Sternothyroid

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 2
Lateral view of the infrahyoid muscles of the neck.