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Sternohyoid
The sternohyoid (Latin: musculus sternohyoideus) is a thin strap-like neck muscle extending between the sternum and the hyoid bone. Together with the omohyoid, sternothyroid and thyrohyoid muscles, it is classified as the infrahyoid muscle. The sternohyoid also belongs to the anterior neck muscles group.
| Sternohyoid | |
| Origin | Manubrium of sternum |
| Insertion | Body of hyoid bone |
| Action | Depresses hyoid bone |
| Innervation | Anterior rami of 1st to 3rd cervical spinal nerves (C1-C3) via ansa cervicalis |
| Blood supply | Superior thyroid artery |
Origin
The sternohyoid originates from the manubrium of the sternum.
Insertion
The sternohyoid muscle inserts on the inferior aspect of the body of the hyoid bone.
Action
The primary function of the sternohyoid is to depress the hyoid bone.
Innervation
Nerve supply to the sternohyoid muscle is provided by the anterior rami of the 1st to 3rd cervical spinal nerves (C1 - C3) via the ansa cervicalis of the cervical plexus.
Blood supply
The sternohyoid receives arterial blood supply from the superior thyroid artery - a branch of the external carotid artery.
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