Changes in vocal loudness following intensive voice treatment (LSVT®) in individuals with Parkinson's disease: A comparison with untreated patients and nornal age-matched controls

Lorraine O. Ramig, Shimon Sapir, Cynthia Fox, Stefanie Countryman

Research output: Contribution to journalArticlepeer-review

Abstract

This study assessed the impact of the Lee Silverman Voice Treatment (LSVT®) on vocal loudness [sound pressure level (SPL)] in a group of dysarthric individuals with idiopathic Parkinson's disease (IPD). Pre- to post-treatment changes in SPL in the treated group were compared with changes in voice SPL during the same time in two control groups: individuals with IPD not treated with the LSVT® and in non-disordered individuals, age-matched to the patients. All subjects produced the same voice and speech tasks-sustaining vowel phonation, reading the "Rainbow Passage," producing a short monologue, and describing a picture. These tasks were recorded at three different occasions: just prior to treatment, just after treatment, and 6 months following treatment. The individuals treated with LSVT® increased voice SPL from baseline to post-treatment by an average of 8 dB and from baseline to 6 months follow-up by an average of 6 dB. These changes were statistically significant and perceptibly audible. No significant changes in SPL were observed in the control groups during the time corresponding to the treatment and follow-up. Differences in SPL between the treated and untreated patients at post-treatment and follow-up were statistically significant for all voice and speech tasks. These findings, along with others, provide additional support for the efficacy of the LSVT®.

Original languageEnglish
Pages (from-to)79-83
Number of pages5
JournalMovement Disorders
Volume16
Issue number1
DOIs
StatePublished - Jan 2001
Externally publishedYes

Keywords

  • Dysarthria
  • LSVT®
  • Parkinson's disease
  • Speech therapy
  • Vocal loudness

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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