The thyrohyoid (also thyrohyoid muscle, latin: musculus thyrohyoideus) is a paired skeletal muscle located in the neck region between the thyroid cartilage and the hyoid bone that depresses the hyoid bone. The thyrohyoid belongs to the infrathyroid muscle group.
The thyrohyoid originates from the oblique line of the thyroid cartilage and inserts onto the greater horn of the hyoid bone.
Contractions of the thyrohyoid pull the hyoid bone downward, and bring the hyoid bone and the thyroid cartilage closer together.
The thyrohyoid is innervated by the first cervical spinal nerve (C1), which joins hypoglossal nerve (CN XII) for a short distance.