Summary
Purpose
To verify the effect of resonance tube voice therapy on the vocal aspects of patients
with Parkinson's Disease (PD).
Method
Intra-subject comparative controlled clinical trial with a single group assignment.
Fourteen individuals with PD (10 men, mean age 66.1 years; four women, mean age 73.75
years) received eight 45-minute sessions of voice therapy, twice a week for 4 weeks.
The therapy consisted of semi-occluded vocal tract exercises – phonation method in
a resonance tube (glass, 27 cm x 9 mm) in water. Tube depth in water ranged from 2
cm to 9 cm, as the difficulty in carrying out the exercises increased (usual pitch,
high pitch, low pitch, ascending/descending glissandos), followed by sentence production.
The assessments were made three times: at baseline (Time0), after 30 days without
intervention (Time1), and 1 day after eight intervention sessions (Time2). The following
aspects were assessed: vocal intensity; acoustic parameters (Smoothed Cepstral Peak
Prominence – CPPs, alpha ratio, and L1-L0 difference); auditory-perceptual analysis
of the overall degree of vocal quality deviation; voice symptoms (Voice Symptom Scale
protocol - VoiSS) and voice-related quality of life (Voice-Related Quality of Life
Protocol – V-RQOL). The results were compared at the three times of assessment Time0/Time1/Time2
using one-way repeated measures ANOVA test and Tukey test (5% significance).
Results
intervention significantly increased: vocal intensity, L1-L0 value of vowel /a/ and
counting, CPP value in counting, and decreased: the overall degree of vocal quality
deviation in 78% of participants, the total score of VoiSS protocol, the limitation,
and emotional subscales. In addition, the intervention increased the score of all
the domains of V-RQOL protocol - physical, socio-emotional, and total.
Conclusion
Resonance tube phonation in voice therapy was effective in increasing vocal intensity
and long-term acoustic parameters, the improved overall degree of vocal quality, reducing
voice symptoms, and increasing voice-related quality of life in individuals with PD.
Key Words
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Article info
Publication history
Published online: June 05, 2022
Accepted:
April 21,
2022
Publication stage
In Press Corrected ProofFootnotes
We would like to thank the São Paulo Research Foundation – FAPESP (grant #2018/19761-5) for supporting the current research. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
Identification
Copyright
© 2022 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
