Article/Report  |   October 2001
Speech Motor Stability in IPD
 
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Article Information
Hearing Disorders / Attention, Memory & Executive Functions / Speech, Voice & Prosody / Speech
Article/Report   |   October 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: 44

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.

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