XXX Electromyographic Investigation of Human Vocal Cord Paralysis

Mild Vocal Fold Paresis: Understanding Clinical Presentation and Electromyographic Findings

“…Neuropathy was defined as an abnormality in MUAP amplitude, MUAP duration, recruitment pattern, and/or insertional activity with the above-mentioned, predefined normative parameters and in accordance with existing literature regarding electromyographic findings in vocal fold paralysis (Figures 1-3). [6][7][8][9][10][11][12][13][14][15]18,25 Increased MUAP duration was defined as a MUAP duration greater than 20 ms. Increased amplitude was defined as a MUAP amplitude that was greater than 1 mV.…”

“…[3][4][5] Most studies that have described electromyographic findings in the larynx have been performed in immobile vocal folds. [6][7][8][9][10][11][12] Few studies have investigated the relationship between electromyography and mild vocal fold hypomobility. [13][14][15][16][17][18] Abnormalities in the electrical signal have been found with electromyography in cases in which vocal fold paresis was suspected.…”

Recent Advances in Phonosurgery

“…Iwamura (1974) attempted to restore both adduction and abduction by anastomosis of the split vagus to the adductor branch of the recurrent laryngeal nerve and of the phrenic nerve to the abductor branch successfully in dog. The failure or difficulty in restoring the purposeful vocal cord movement especially in patients has been attributed mainly to a long period of denervation before surgery and to the random intermingling arrangement of two kinds of antago nistic fibers in the recurrent laryngeal nerve (Sunderland and Swaney, 1952) and consequent nerve misdirection (Siribodhi el al., 1963;Hiroto et al. 1968).…”

Paralisia do músculo cricoaritenóideo lateral: relato de caso como contribuição ao estudo da anatomia funcional da laringe

“…Woodson 20 não observou diferença estatisticamente significante entre o ângulo formado pelas pregas vocais considerando grupos de pacientes com lesões apenas recorrenciais ou vagais completas, concluindo que o músculo CT não é um fator determinante na posição da laringe paralisada. A mesma autora, Hiroto et al 27 , . 1a, 1b, 1c).…”

“…Este caso de paralisia isolada do músculo CAL permitiu-nos, além de um melhor conhecimento da anatomia funcional da laringe, a sinalização de uma conduta semiológica na diferenciação das paralisias recorrenciais e fixações. Desta forma, acreditamos que diante de resultados normais do músculo TA os demais adutores deverão ser testados para a obtenção do diagnóstico preciso, exceto o IA que possui inervação bilateral 24 e que nas paralisias recorrenciais unilaterais sempre apresenta EMG normal 27 .…”