Muscle | Innervation | Action |
Cricothyroid | External branch of superior laryngeal | Elongates, thins, and lowers the vocal fold |
Posterior cricoarytenoid | Recurrent laryngeal | Sole abductor of the larynx; elevates, elongates, and thins the vocal fold |
Lateral cricoarytenoid | Recurrent laryngeal | Elongates, thins, and adducts the vocal fold |
Interarytenoid | Recurrent laryngeal and branches of the superior laryngeal | Adducts the vocal fold |
Aryepiglottic | Recurrent laryngeal | Adducts the vocal fold and aryepiglottic fold |
Thyroarytenoid | Recurrent laryngeal | Adducts the vocal fold |
Vocalis (part of the thyroarytenoid) | Recurrent laryngeal | Adducts and thickens the vocal fold |
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