Larynx Muscle group Upper Body The intrinsic muscles of the larynx that control the vocal folds and airway. 9 muscles Aryepiglottic Ceratocricoideus Cricothyroid Lateral Cricoarytenoid Oblique Arytenoid Posterior Cricoarytenoid Thyroarytenoid Thyroepiglottic Transverse Arytenoid