53-8) and the posterior aspect of the larynx is related to the laryngopharynx, the prevertebral fascia and muscles, and to the bodies of cervical vertebrae 3 to 6. Laterally, the larynx is related to the carotid sheath, infrahyoid muscles, sternomastoid muscle, and the thyroid gland.he laryngopharynx extends from the superior border of the epiglottis to the inferior border of the cricoid cartilage, where it becomes continuous with the esophagus. Its anterior aspect has the inlet of the larynx and the posterior aspects of the arytenoid and cricoid cartilages.