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Original Paper

Long-Term Phonatory Instability in Ataxic Dysarthria

Boutsen F.a · Duffy J.R.b · Dimassi H.c · Christman S.S.a

Author affiliations

aUniversity of Oklahoma Health Sciences Center, Oklahoma City, Okla., and bMayo Clinic, Rochester, Minn., USA; cAmerican University of Beirut, Beirut, Lebanon

Related Articles for ""

Folia Phoniatr Logop 2011;63:216–220

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: November 19, 2010
Issue release date: June 2011

Number of Print Pages: 5
Number of Figures: 0
Number of Tables: 3

ISSN: 1021-7762 (Print)
eISSN: 1421-9972 (Online)

For additional information: http://www.karger.com/FPL

Abstract

Aims: Long-term phonatory instability can be quantified using cyclical and noncyclical measures. The objective of this study is to evaluate phonation in ataxic dysarthria and a control group of normal speakers to answer two main questions: (1) How common is elevated cyclical and noncyclical instability in ataxic dysarthria compared to that in a normal control group? (2) Is cyclical instability predictive of noncyclical instability? Methods: Vowel prolongations of ataxic-dysarthric and normal speakers were compared using the Motor Speech Profile module of the Computerized Speech Lab. Cyclical measures included tremor rate, amplitude and periodicity. Noncyclical measures included the coefficient of variation for loudness and frequency. Results: Noncyclical measures are elevated in a subset of speakers with ataxic dysarthria regardless of whether cyclical instability (vocal tremor) is present. Cyclical instability was detected in nearly half the patients. Interestingly, elevations in both types of measures also described phonation of a number of the participants in the control group. Conclusion: Combined use of cyclical and noncyclical measures can document aspects of phonation in ataxic dysarthria that have clinical implications.

© 2010 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: November 19, 2010
Issue release date: June 2011

Number of Print Pages: 5
Number of Figures: 0
Number of Tables: 3

ISSN: 1021-7762 (Print)
eISSN: 1421-9972 (Online)

For additional information: http://www.karger.com/FPL


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