AI Article Synopsis
- The study aimed to explore how individuals with Parkinson's disease (PD) manage airflow when speaking, comparing their performance to healthy older adults (HOA).
- Results showed that speakers with PD had significantly higher average airflow during vocalizations and exhibited more variability in airflow regulation both within individual breath groups and across different speaking instances.
- These findings indicate that individuals with PD struggle with controlling airflow during speech, which may stem from structural or motor function issues, necessitating further research to understand these impairments better.
Article Abstract
The purpose of this study was to investigate how speakers with Parkinson's disease (PD) regulate transglottal airflow during phonation within and across breath groups, compared to healthy older adult (HOA) speakers. Aerodynamic recordings from 22 speakers with PD and 22 HOA speakers were compared. Transglottal airflow was measured from vocalic portions of consonant-vowel syllables and an all-voiced sentence using a pneumotachograph. Mean airflow in vowels and sentences in addition to the regularity (standard deviation) of airflow within and across separate productions (different breath groups) was computed. Results indicated that speakers with PD manifested significantly greater mean airflow in vowels and sentences compared to HOA speakers. The regulation of airflow was significantly more variable in vowels both within and across breath groups in speakers with PD. In addition, the regulation of airflow in sentences was significantly more variable across breath groups in speakers with PD. These findings support the theory that speakers with PD exhibit impairments in the ability to control transglottal airflow in phonation. Results indicated that speakers with PD manifested elevated measures of transglottal airflow, which on average fall outside of reported ranges of normal and are different than older adults without PD. Furthermore, this study found that speakers with PD have difficulty regulating the consistency of transglottal airflow during phonation, both within and across breath groups. Whether these impairments result from glottal insufficiency due to peripheral structural changes, central motor dysregulation, or both is in need of further investigation.
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| http://dx.doi.org/10.1016/j.jvoice.2019.06.021 | DOI Listing |
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