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Acoustic Analysis of PD Speech
Karen Chenausky1, Joel Macauslan, Richard Goldhor
1Speech Technology and Applied Research Corporation, Bedford, MA 01730-1417, USA.
Parkinson'S Disease
|October 7, 2011
Summary
Deep brain stimulation (DBS) can improve speech in Parkinson's disease (PD) patients, but settings maximizing motor function may worsen communication. Further research aims to optimize DBS for both motor and speech functions.
Area of Science:
- Neurology
- Speech-Language Pathology
Background:
- Parkinson's disease (PD) affects 500,000 Americans, with 70-90% experiencing hypokinetic dysarthria.
- Deep brain stimulation (DBS) is effective for advanced PD motor symptoms but may impact speech.
Purpose of the Study:
- To investigate speech changes in PD patients undergoing DBS for motor symptom relief.
- To assess the effect of DBS settings optimized for motor performance on speech characteristics.
Main Methods:
- Analyzed speech parameters (syllable rate, variability, vowel fraction, etc.) in 10 PD patients and 12 controls.
- Normalized speech measures to assess deviation from normal, creating a composite score.
Main Results:
- DBS settings can improve speech, bringing it closer to normal by up to three standard deviations.
- Clinically motivated DBS settings, while relieving motor symptoms, showed a greater tendency to impair speech than improve it.
Conclusions:
- Optimizing DBS for motor function may inadvertently compromise speech in Parkinson's disease patients.
- A feedback device could aid clinicians in selecting DBS parameters that balance motor improvement with preserved communication.
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