Foerster G, et al. - The intent of this paper was to characterize or prove a recurrent laryngeal nerve (RLN) lesion in cases of vocal fold immobility via laryngeal electromyography (LEMG). The data exhibited that posterior cricoarytenoid (PCA)-LEMG was better in proving an RLN lesion than thyroarytenoid (TA)-EMG alone. Etiology-dependent variations were indicated in the TA/PCA lesion pattern. A preferential damage to PCA innervation in iatrogenic lesions could be relevant for additional improvements of intraoperative neuromonitoring.