An Electromyographic Study of Recurrent Laryngeal Nerve Paralysis

Abstract

Electromyographic investigations of the intrinsic laryngeal muscles were carried out in 29 human cases with recurrent laryngeal nerve paralysis and in 14 canine cases, in which unilateral recurrent laryngeal nerve paralysis was experimentally caused by various methods of crushing, section and suture after section of the nerve. The observations in dogs were repeated before the operation and several minutes, several days, a i onth and every months up to death after causing paralysis. The laryngoscopic view of the position of the vocal cords was compared with the electromyogram in every case.

Restoring Vocal Fold Movement after Transection and Immediate Suturing of the Recurrent Laryngeal Nerve with Local Application of Basic Fibroblast Growth Factor: An Experimental Study in the Rat

“… 14 In related reports, the recovery of imperceptible adductive vocal fold movement was low, ranging from 0% to 29%. 15–18 In our study, vocal fold movement recovered in seven of eight (87.5%) animals in the bFGF group and three of eight (37.5%) animals in the PBS group after 90 days. Furthermore, we observed both adduction and abduction of the vocal fold in some animals treated with bFGF.…”

Laryngeal Reinnervation With the Hypoglossal Nerve: II. Clinical Evaluation and Early Patient Experience

“…Several case reports since then reported improved vocal fold mobility after reinnervation, 2–4 but most investigators have not observed restored mobility. 5–9 Some have shown return of electromyographic (EMG) activity to the reinnervated larynx, but without functional movement. 10–14 …”

La parésie unilatérale du pli vocal: corrélation entre laryngoscopie et électromyographie

“…l'innervation est complexe -en l'oc currence l'existence de muscles adducteurs et abducteurs du pli vocal innervés par un même récurrent -il peut se produire des «erreurs d'aiguillage»: en effet, des axones régénérés à fonction abductricc peuvent s'engager dans des faisceaux menant à des muscles adduc teurs et réciproquement. Ce phénomène d'in nervation paradoxale [4,[8][9][10][11][12][13] peut donner lieu à des syncinésies d'abducteurs et d'ad ducteurs, ce qui est néfaste sur le plan fonc tionnel.…”