Thyrohyoid:The thyrohyoid is a short band of muscle, thought to be a continuation of the sternothyroid muscle, which depresses the hyoid and elevates the larynx.
Origin: oblique line of the thyroid cartilage
Insertion: lower border of the hyoid bone
Actions: Depresses the hyoid. If the hyoid bone is fixed, it can elevate the larynx.
Innervation: Anterior ramus of C1, carried within the hypoglossal nerve.