The sternohyoid is an infrahyoid muscle of the neck. It is located in the superficial plane of the neck, along with the omohyoid muscle.
- Attachments: Originates from the sternum and sternoclavicular joint. Ascends to insert onto the hyoid bone.
- Actions: Depresses the hyoid bone.
- 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).