Summary
Objective
To verify whether the dimensions of different segments of the oropharyngeal cavity
have different proportions between Parkinson's disease patients and vocally healthy
subjects and investigate whether the measurements of these subjects’ oropharyngeal
geometry associate with their acoustic measurements of voice.
Method
Quantitative, descriptive, cross-sectional, and retrospective study with secondary
data, approved by the Human Research Ethics Committee under no. 4.325.029. We used
vocal samples and data from the oropharyngeal geometry of 40 subjects – 20 with Parkinson's
disease stages I to III and 20 who formed the control group, matched for sex and age.
Each group had 10 males and 10 females, mean age of 61 years (±6.0). Formant (F1,
F2, and F3) and cepstral measures of the sustained vowel /ε/ were extracted and arranged
in the database to determine their values using Praat software. The data were descriptively
analyzed, with statistics generated with R software. The proportion of oropharyngeal
geometry measurements was arranged by mean values and coefficients of variation. Pearson's
linear correlation test was applied to relate voice parameters to oropharyngeal geometry,
considering P < 0.05, and linear regression test, to justify F2.
Results
The Parkinson's disease group showed a linear relationship between oral cavity length
and F1 in males (P = 0.04) and between glottal area and F2 in females (P = 0.00); linear relationships were established according to age in both groups, and
a regression model for F2 was estimated (R2 = 0.61). There was no difference between pathological and healthy voices; there was
a difference in the proportional relationship of oropharyngeal geometry between the
groups.
Conclusion
The proportional relationship of oropharyngeal geometry differs between the Parkinson's
disease group and the control group, as well as the relationship between oropharyngeal
geometry and formant and cepstral values of voice according to the subjects’ sex and
age.
Key Words
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Article info
Publication history
Published online: March 11, 2022
Accepted:
January 24,
2022
Publication stage
In Press Corrected ProofFootnotes
Financial support by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) – Finance Code 001.
Identification
Copyright
© 2022 The Voice Foundation. Published by Elsevier Inc. All rights reserved.
