lateral thyrohyoid ligament lateral thyrohyoid ligament the lateral thyrohyoid ligament (lateral hyothyroid ligament) is a round elastic cord, which forms the posterior border of the thyrohyoid membrane and passes between the tip of the superior cornu of the thyroid cartilage and the extremity of the greater cornu of the hyoid bone. the internal branch of the superior laryngeal nerve typical lies lateral to this ligament. lateral thyrohyoid ligamentthe ligaments of the larynx. antero-lateral view.detailsidentifierslatinligamentum thyreohyoideum laterale, ligamentum hyothyreoideum lateralefma55139anatomical terminology triticeal cartilage a small cartilaginous nodule (cartilago triticea), sometimes bony, is frequently found in the lateral thyrohyoid ligament.