Effect of LSVT on lexical tone in speakers with Parkinson’s disease

Tara Loraine WHITEHILL, Li Ying Lorinda KWAN-CHEN, Flora P.-H. LEE, Mia M.-N. CHOW

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Abstract

Lee Silverman Voice Treatment (LSVT) has well-documented treatment efficacy for individuals with hypokinetic dysarthria associated with Parkinson's disease (PD). Positive changes have been noted after treatment not only for vocal loudness but also for many other speech dimensions, including intonation (monotonicity). There have been few studies investigating the effect of LSVT on lexical tone which, like intonation, is controlled by variations in fundamental frequency. This study involved 12 Cantonese speakers with idiopathic PD who were enrolled in a standard LVST treatment protocol. Speech data were collected 3-4 days before treatment and 1 day after treatment. A wide variety of perceptual and acoustic variables were analyzed. The results showed significant improvements in loudness and intonation after treatment, but no significant changes in lexical tone. These results have theoretical implications for the relationship between tone and intonation and for models of the physiological control of fundamental frequency. Copyright © 2011 Tara L. Whitehill et al.
Original languageEnglish
Article number897494
JournalParkinson's Disease
Volume2011
DOIs
Publication statusPublished - 2011

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Parkinson Disease
Therapeutics
Dysarthria
Clinical Protocols
Acoustics

Citation

Whitehill, T. L., Kwan, L., Lee, F. P.-H., & Chow, M. M.-N. (2011). Effect of LSVT on lexical tone in speakers with Parkinson’s disease. Parkinson's Disease, 2011. Retrieved from http://dx.doi.org/10.4061/2011/897494