Authors: De Letter M, Santens P, Van Borsel J
Title: The Effects of Levodopa on Word Intelligibility in Parkinson’s Disease
Source: Journal of Communication Disorders 2005 38(3): 187-196
Year: 2005
Research Design: Case Series

Dysarthria is a common manifestation in patients with idiopathic Parkinson's disease. This study investigated the effects of levodopa on intelligibility in patients with Parkinson's disease. Ten participants were tested during on- and off-states using the Yorkston and Beukelman intelligibility test (1980). Intelligibility as scored by a panel of speech therapists was significantly improved in the on-condition. No correlation was found, however, between intelligibility and overall severity of the disease or severity of the motor problems.

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