Parkinson’s Disease / 2015 / Article / Tab 2

Clinical Study

Articulatory Changes in Vowel Production following STN DBS and Levodopa Intake in Parkinson’s Disease

Table 2

Means (standard deviations) for vowel duration (msec.), acoustic vowel space (Hz2), and formant centralization ratio before and after STN DBS, off- and on-medication.

Pre-opPost-op
Off-medOn-medOff-medOn-med

Vowel duration (msec.)105.0
(24.7)
103.2
(31.1)
102.6
(18.7)
102.8
(22.4)

Acoustic vowel space (Hz2)246006
(48045)
222166
(73934)
222430
(45823)
236810
(69166)

Formant centralization ratio1.09
(0.06)
1.14
(0.09)
1.12
(0.06)
1.10
(0.07)

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