Relationship Between Swallowing Function and Maximum Phonation Time in Patients With Parkinsonism
Eu Jeong Ko1, Minji Chae1, Sung-Rae Cho1,2,3,4
1Department of Rehabilitation Medicine and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.
Annals of Rehabilitation Medicine
|July 3, 2018
Summary
Maximum phonation time (MPT) correlates with swallowing function in Parkinsonism patients. This finding supports voice therapy as a treatment for dysphagia, improving speech and swallowing.
Area of Science:
- Neurology
- Speech-Language Pathology
- Otolaryngology
Background:
- Parkinsonism often leads to dysphagia, impacting quality of life.
- Understanding the link between voice production and swallowing is crucial for effective treatment.
Purpose of the Study:
- To investigate the relationship between maximum phonation time (MPT) and swallowing function in Parkinsonism patients.
- To establish a rationale for speech therapy interventions targeting dysphagia in this population.
Main Methods:
- Thirty Parkinsonism patients underwent speech evaluation for MPT and videofluoroscopic swallowing study (VFSS).
- Dysphagia was assessed using Penetration Aspiration Scale (PAS), NIH-Swallowing Safety Scale (NIH-SSS), and Videofluoroscopic Dysphagia Scale (VDS).
- Pearson correlation and independent t-tests were used for statistical analysis.
Main Results:
- Normal MPT correlated with better bolus formation and laryngeal elevation.
- Longer MPT was associated with intact oral transit time and pharyngeal swallow triggering.
- MPT showed significant correlation with VDS and modest correlation with NIH-SSS, but not PAS.
Conclusions:
- A significant correlation exists between maximum phonation time and key oropharyngeal swallowing functions.
- These findings provide evidence supporting voice therapy as a beneficial treatment for dysphagia in Parkinsonism.
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