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| Muscle | Origin | Insertion | Action | Nerve |
| aryepiglotticus | arytenoid cartilage apex | epiglottis (lateral border) | assists in closure of additus of larynx | vagus nerve (CN X, recurrent laryngeal branch) |
| cricrothyroid | cricoid cartilage (anterolateral aspect) | thyroid cartilage (inferior cornu & lower laminar) | lengthens & tenses vocal cords by tilting thyroid cartilage forwards (increases pitch of sound) | vagus nerve (CN X, superior laryngeal) |
| cricoarytenoid | cricoid cartilage (posterior aspect) | arytenoid cartilage (muscular process) | abduction & lateral rotation arytenoid cartilage (opens rima glottidis) | vagus nerve (CN X, recurrent laryngeal branch) |
| oblique arytenoid | arytenoid cartilage (muscular process) | superior pole of opposite arytenoid cartilage | adduction of arytenoid cartilages (closes rima glottidis ) | vagus nerve (CN X, recurrent laryngeal branch) |
| lateral cricoarytenoid | cricoid cartilage (lateral aspect of arch) | arytenoid cartilage (muscular process) | adduction & medial rotation of arytenoid cartilage (closes rima glottidis) | vagus nerve (CN X, recurrent laryngeal branch) |
| thyro-arytenoid & vocalis | thyroid cartilage (lower posterior surface of angle between laminae) | arytenoid cartilage (vocal process) | shortens & relaxes vocal cords by medial rotation & protraction of arytenoid cartilage (lowers pitch of sound) | vagus nerve (CN X, recurrent laryngeal branch) |
| thyro-epidlotticus & vocalis | thyroid cartilage (lower posterior surface) | epiglottis (lateral border) | assists in closure of additus to larynx | vagus nerve (CN X, recurrent laryngeal branch) |
| transverse arytenoid | arytenoid cartilage (posterior surface & muscular process) | corresponding surfaces of opposite side arytenoid cartilage | adduction arytenoid cartilage (closes rima glottidis) | vagus nerve (CN X, recurrent laryngeal branch) |