Speech Motor Stability in IPD Effects of Rate and Loudness Manipulations Research Article
Research Article  |   October 01, 2001
Speech Motor Stability in IPD
 
Author Affiliations & Notes
  • Jennifer Kleinow
    Department of Audiology and Speech Sciences Purdue University West Lafayette, IN
  • Anne Smith
    Department of Audiology and Speech Sciences Purdue University West Lafayette, IN
  • Lorraine Olson Ramig
    Department of Communication Disorders and Speech Science University of Colorado-Boulder and The Wilbur James Gould Voice Center The Denver Center for the Performing Arts Denver, CO
  • Contact author: Jennifer Kleinow, PhD, Purdue University, Department of Audiology and Speech Science, Heavilon Hall, West Lafayette, IN, 47907.
    Contact author: Jennifer Kleinow, PhD, Purdue University, Department of Audiology and Speech Science, Heavilon Hall, West Lafayette, IN, 47907.×
  • Corresponding author: E-mail: jkleinow@expert.cc.purdue.edu
Article Information
Hearing & Speech Perception / Acoustics / Hearing Disorders / Attention, Memory & Executive Functions / Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   October 01, 2001
Speech Motor Stability in IPD
Journal of Speech, Language, and Hearing Research, October 2001, Vol. 44, 1041-1051. doi:10.1044/1092-4388(2001/082)
History: Received October 3, 2000
 
Journal of Speech, Language, and Hearing Research, October 2001, Vol. 44, 1041-1051. doi:10.1044/1092-4388(2001/082)
History: Received October 3, 2000
Web of Science® Times Cited: 60

Increasing phonatory effort, an integral component of the Lee Silverman Voice Treatment, LSVT, has been identified as an effective management strategy for adults with hypokinetic dysarthria associated with Parkinsonism. The present study compares the effects of increased loudness on lower lip movements to those of changes in speaking rate, another approach to the treatmentm of hypokinetic dysarthria. Movements of the lower lip/jaw during speech were recorded from 8 adults with IPD, 8 healthy aged adults, and 8 young adults. The spatiotemporal index (STI), a measure of spatial and temporal variability, revealed that for all speaker groups slow rate was associated with the most variability. Compared to the other conditions, STI values from the loud condition were closest to those from habitual speech. Also, the normalized movement pattern for the loud condition resembled that of habitual speech. It is hypothesized that speaking loudly is associated with a spatial and temporal organization that closely resembles that used in habitual speech, which may contribute to the success of the LSVT.

Acknowledgments
This work was supported by NIH grants DC01150 and DC00559 from NIDCD.
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