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Updated: Aug 19, 2026

Rating L-DOPA-Induced Dyskinesias in the Unilaterally 6-OHDA-Lesioned Rat Model of Parkinson's Disease
Published on: October 4, 2021
The effects of levodopa on word intelligibility in Parkinson's disease
Miet De Letter1, Patrick Santens, John Van Borsel
1Department of Oto-Rhino-Laryngology, Ghent University Hospital, De Pintelaan 185, B-9000 Ghent, Belgium.
Abstract:
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. EDUCATIONAL OUTCOMES: As a result of this activity the participant will be able to discuss the effects of levodopa on intelligibility in patients with Parkinson's disease.
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