Efeitos da estimulação elétrica nervosa transcutânea e da terapia manual laríngea na disfonia por tensão muscular: ensaio clínico randomizado
Effects of transcutaneous electrical nerve stimulation and manual laryngeal therapy on muscle tension dysphonia: randomized clinical trial
Isadora de Oliveira Lemos; Kelly Cristina Alves Silvério; Mauriceia Cassol
Resumo
Objetivo: Comparar os efeitos imediatos da Estimulação Elétrica Nervosa Transcutânea (TENS), da Terapia Manual Laríngea (TML) e da aplicação combinada de ambas em mulheres com Disfonia por Tensão Muscular (DTM), considerando sintomas vocais, qualidade vocal, medidas aerodinâmicas e níveis de sensação de tensão muscular à palpação. Método: Trata-se de um ensaio clínico randomizado. Foram incluídas mulheres com diagnóstico fonoaudiológico de Disfonia por Tensão Muscular, alocadas em três grupos de intervenção: TENS, TML e TENS+TML. As participantes foram avaliadas quanto aos sintomas vocais, intensidade da dor musculoesquelética, avaliação perceptivo-auditiva da qualidade vocal pela escala GRBAS, tempos máximos de fonação (TMF), relação S/Z e níveis de sensação de tensão muscular à palpação com o protocolo Laryngeal Palpatory Scale (LPS). Resultados: Observou-se redução significativa dos sintomas vocais, incluindo fadiga vocal, e de dor musculoesquelética após as intervenções, bem como aumento dos TMF em todos os grupos. No grupo TENS, houve redução da soprosidade vocal; no grupo TML, observou-se redução significativa do grau geral da alteração vocal; e no grupo TENS+TML, uma redução do grau geral de alteração e da tensão vocal. O LPS demonstrou diminuição significativa da sensação de tensão muscular à fonação no grupo TENS+TML. Conclusão: Todas as intervenções apresentaram efeitos positivos, com redução significativa dos sintomas vocais e da dor musculoesquelética, além do aumento dos tempos máximos de fonação. As técnicas combinadas foram capazes de proporcionar melhores ajustes vocais e diminuir a sensação de tensão muscular à palpação, evidenciando que ambas as abordagens foram eficazes em promover benefícios vocais e musculoesqueléticos
Palavras-chave
Abstract
Purpose: To compare the immediate effects of Transcutaneous Electrical Nerve Stimulation (TENS), Laryngeal Manual Therapy (LMT), and the combined application of both in women with Muscle Tension Dysphonia (MTD), considering vocal symptoms, voice quality, aerodynamic measures, and levels of perceived muscle tension on palpation. Methods: This was a randomized clinical trial including women with a speech-language diagnosis of MTD, allocated into three intervention groups: TENS, LMT, and TENS+LMT. Participants were assessed for vocal symptoms, musculoskeletal pain intensity, perceptual-auditory evaluation of voice quality using the GRBAS scale, maximum phonation times (MPT), S/Z ratio, and levels of perceived muscle tension on palpation using the Laryngeal Palpatory Scale (LPS). Results: Significant reductions in vocal symptoms, including vocal fatigue, and musculoskeletal pain were observed after the interventions, along with increased MPT in all groups. In the TENS group, breathiness decreased; in the LMT group, there was a significant reduction in overall voice alteration; and in the TENS+LMT group, reductions were observed in overall voice alteration and vocal tension. The LPS also showed a significant decrease in perceived muscle tension during phonation in the TENS+LMT group. Conclusion: All interventions showed positive effects, with significant reductions in vocal symptoms and musculoskeletal pain, as well as increases in MPT. The combined techniques were able to provide better vocal adjustments and reduce perceived muscle tension on palpation, demonstrating that both approaches were effective in promoting vocal and musculoskeletal benefits.
Keywords
Referências
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Submetido em:
17/07/2025
Aceito em:
21/10/2025


