Transverse arytenoid

Origin: One arytenoid cartilage

Insertion: Contralateral arytenoid cartilage

Innervation: Inferior laryngeal nerve (terminal part of recurrent laryngeal nerve, from CN X)

Main Action: Adducts arytenoid cartilages (adducting intercartilaginous portion of vocal folds, closing posterior rima glottidis)