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Abstract
The purpose of this study was to evaluate the long-term (12 months) effects of two forms of speech treatment on the speech and voice deficits that occur in Parkinson's disease. Thirty-five patients with idiopathic Parkinson's disease were assigned to one of two speech treatment groups: voice and respiration (The Lee Silverman Voice Treatment [LSVT]) or placebo (respiration) treatment. Vocal intensity data from before, immediately after, and at 6 and 12 months after speech treatment revealed statistically significant differences between the treatment groups. Only subjects in the LSVT group improved or maintained vocal intensity above pretreatment levels by 12 months after treatment. The placebo group had statistically significant deterioration of vocal intensity levels from before to 12 months after treatment during conversational monologue. The LSVT group did not deteriorate to levels below pretreatment in vocal intensity over the 12-month period. This study is the first to document the short- and long-term effects of intensive speech treatment (LSVT), which focuses on the voice, for patients with Parkinson's disease compared with a placebo speech treatment group.
NEUROLOGY 1996;47: 1496-1504
- Copyright 1996 by Advanstar Communications Inc.
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