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Published in: Neurological Sciences 10/2018

01-10-2018 | Original Article

Investigating the effect of STN-DBS stimulation and different frequency settings on the acoustic-articulatory features of vowels

Authors: Atilla Yilmaz, Elif Tuğba Sarac, Fatma Esen Aydinli, Mustafa Turgut Yildizgoren, Emine Esra Okuyucu, Yurdal Serarslan

Published in: Neurological Sciences | Issue 10/2018

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Abstract

Introduction

Parkinson’s disease (PD) is the second most frequent progressive neuro-degenerative disorder. In addition to motor symptoms, nonmotor symptoms and voice and speech disorders can also develop in 90% of PD patients. The aim of our study was to investigate the effects of DBS and different DBS frequencies on speech acoustics of vowels in PD patients.

Methods

The study included 16 patients who underwent STN-DBS surgery due to PD. The voice recordings for the vowels including [a], [e], [i], and [o] were performed at frequencies including 230, 130, 90, and 60 Hz and off-stimulation. The voice recordings were gathered and evaluated by the Praat software, and the effects on the first (F1), second (F2), and third formant (F3) frequencies were analyzed.

Results

A significant difference was found for the F1 value of the vowel [a] at 130 Hz compared to off-stimulation. However, no significant difference was found between the three formant frequencies with regard to the stimulation frequencies and off-stimulation. In addition, though not statistically significant, stimulation at 60 and 230 Hz led to several differences in the formant frequencies of other three vowels.

Conclusion

Our results indicated that STN-DBS stimulation at 130 Hz had a significant positive effect on articulation of [a] compared to off-stimulation. Although there is not any statistical significant stimulation at 60 and 230 Hz may also have an effect on the articulation of [e], [i], and [o] but this effect needs to be investigated in future studies with higher numbers of participants.
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Metadata
Title
Investigating the effect of STN-DBS stimulation and different frequency settings on the acoustic-articulatory features of vowels
Authors
Atilla Yilmaz
Elif Tuğba Sarac
Fatma Esen Aydinli
Mustafa Turgut Yildizgoren
Emine Esra Okuyucu
Yurdal Serarslan
Publication date
01-10-2018
Publisher
Springer Milan
Published in
Neurological Sciences / Issue 10/2018
Print ISSN: 1590-1874
Electronic ISSN: 1590-3478
DOI
https://doi.org/10.1007/s10072-018-3479-y

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