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Inicio Revista de Logopedia, Foniatría y Audiología Immediate effect of transcutaneous electrical nervous stimulation and semi-occlu...
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Vol. 42. Issue 1.
Pages 35-40 (January - March 2022)
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Vol. 42. Issue 1.
Pages 35-40 (January - March 2022)
Original article
Immediate effect of transcutaneous electrical nervous stimulation and semi-occluded vocal tract exercises in teachers
Efecto inmediato de la estimulación nerviosa eléctrica transcutánea y los ejercicios del tracto vocal semiocluido en profesores
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Jazmín Pérez-Sereya,
Corresponding author
jazminpz@gmail.com

Corresponding author.
, Francisca Carrascob
a Doctora en ciencias de la Motricidad Humana, Universidad Pedro de Valdivia, Directora carrera de Fonoaudiología UPV-Chillán, Docente Universidad Adventista de Chile, Chile
b Magister en Didáctica y Pedagogía Musical, Docente Universidad Adventista de Chillán, Chile
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Tables (3)
Table 1. Analysis of the Shapiro–Wilk normality tests and the Levene–Homogeneity Test prior to intervention.
Table 2. Comparison between groups with acoustic parameters before and after the intervention.
Table 3. Comparative analysis of Student's T-test for independent samples.
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Abstract

The objective of this study was to determine the immediate effects of transcutaneous electrical nervous stimulation (TENS) and semi-occluded vocal tract (SOVT) exercises on acoustic parameters in teachers in the city of Chillán. The study was based on a quantitative methodological perspective, with a comparative descriptive scope and a quasi-experimental longitudinal design. The sample was composed of 30 teachers belonging to the Reyes de España School, who were evaluated using Praat software, pre and post treatment. The teachers were divided into 2 groups; control group (semi-occluded vocal tract therapy) and experimental group (semi-occluded vocal tract therapy and electrostimulation) who were treated during a single session of approximately 10min. The values of the acoustic parameters were then compared [Jitter, Shimmer, Harmonic to Noise Ratio (HNR) and Maximum Phonation Time (MPT)] between both groups. The acoustic analysis showed statistically significant post-intervention changes in all the parameters evaluated for both study groups, however, in the experimental group the means showed a greater difference, with a p value less than .01. Semi-occluded vocal tract exercises in resonance tubes combined with TENS have immediate positive effects on TMF, Jitter, Shimmer and HNR acoustic parameters in teachers without vocal pathology.

Keywords:
Acoustic parameters
Transcutaneous electrical nervous stimulation
Semi-occluded vocal tract
Teachers
Speech therapy
Voice
Resumen

El objetivo de este estudio fue determinar los efectos inmediatos de la estimulación nerviosa eléctrica transcutánea (TENS) y los ejercicios del tracto vocal semiocluido, semi-occluded vocal tract exercises (SOVT), en los parámetros acústicos de profesores de la ciudad de Chillán, Chile. El estudio se basó en una perspectiva metodológica cuantitativa, con alcance descriptivo comparativo y diseño longitudinal cuasi-experimental. La muestra se compuso de 30 profesores pertenecientes a la Escuela Reyes de España, a quienes se evaluó utilizando el software Praat, pre y postratamiento. Los profesores fueron divididos en dos grupos: el grupo control (terapia del tracto vocal semiocluido) y el grupo experimental (terapia de vocal semiocluida y electroestimulación), que fueron tratados durante una única sesión de aproximadamente 10 minutos, comparándose a continuación los valores de los parámetros acústicos (jitter, shimmer, relación armónico-ruido [HNR] y tiempo máximo de fonación [TMF]), entre ambos grupos. El análisis acústico reflejó cambios postintervención estadísticamente significativos en todos los parámetros evaluados para ambos grupos de estudio; sin embargo, en el grupo experimental las medias reflejaron una mayor diferencia, con un valor p inferior a 0,01. Los ejercicios del tracto vocal semiocluido en tubos de resonancia combinados con TENS tienen efectos positivos inmediatos en los parámetros acústicos TMF, jitter, shimmer y HNR en profesores sin patología vocal.

Palabras clave:
Parámetros acústicos
Estimulación nerviosa eléctrica transcutánea
Tracto vocal semi-ocluido
Profesores
Terapia del habla
Voz

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