Adduction laryngeal dystonia: proposal and evaluation of nasofibroscopy

Laryngoscopy evaluation protocol for the differentiation of essential and dystonic voice tremor

“…In 2006, De Biase et al 17 evaluated patients with adductor laryngeal dystonia using transnasal fiberoptic laryngoscopy and none of the subjects had spasms while performing the whistling. By understanding the dystonic tremor as a variant of dystonia, the expectation is that it will not exhibit dystonic posturing (irregular tremor) during the whistling, as it was demonstrated in this study, in which all patients classified as such showed no tremor.…”

“…The literature regarding adductor laryngeal dystonia has evaluated the change in the intensity of spasms in accordance with the variation of the pitch; phonation in falsetto reduces the stimulus for the occurrence of spasms. 17 Barkmeier and Case (2000) 14 reported that the high pitch has a direct influence on the reduction of the voice tremor magnitude, and this is due to the separation of the vocal folds. Almost all of patients in the present study, both in the /é/ production as in the /i/ production in falsetto, showed horizontal tremor of the larynx with no statistically significant differences between the tasks, demonstrating that, when isolated, they do not differentiate the tremor syndromes.…”

Estudo da deglutição em pacientes com distonia laríngea antes e após o tratamento com toxina botulínica

“…As distonias têm causa desconhecida, embora a maioria dos autores pense que os gânglios da base estejam envolvidos (BIASE et al, 2006). A causa da distonia laríngea, muitas vezes com distúrbios de voz, pode ser o nervosismo e a laringite de refluxo.…”