Cricothyroid
Tenses vocal fold, raises pitch of sound
External Laryngeal n. (X)
Thyroarytenoid
Relaxes vocal fold, decreases pitch of sound
Recurrent Laryngeal n. (X)
Posterior cricoarytenoid
Abducts vocal folds, opens rima glottidis
Recurrent Laryngeal n. (X)
Lateral Cricoarytenoid
Adducts vocal folds, closes rima glottidis
Recurrent Laryngeal n. (X)
Arytenoid (Transverse arytenoid)
Adducts vocal folds, closes rima glottidis
Recurrent Laryngeal n. (X)
Aryepiglottic muscle
Pulls down epiglottis during swalloing
Recurrent Laryngeal n. (X)