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Journal of Speech, Language, and Hearing Research Vol.48 5-20 February 2005. doi:10.1044/1092-4388(2005/002)
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Effects of Neurosurgical Management of Parkinson's Disease on Speech Characteristics and Oromotor Function

Anna Farrell 1
Deborah Theodoros 1
Elizabeth Ward 1
Bruce Hall 2

Peter Silburn 3
1 University of Queensland, Brisbane, Queensland, Australia
2 Mater Private Hospital, Brisbane, Queensland, Australia
3 Princess Alexandra Hospital, Brisbane, Queensland, Australia

annabellafarrell{at}hotmail.com

The present study examined the effects of neurosurgical management of Parkinson's disease (PD), including the procedures of pallidotomy, thalamotomy, and deep-brain stimulation (DBS) on perceptual speech characteristics, speech intelligibility, and oromotor function in a group of 22 participants with PD. The surgical participant group was compared with a group of 25 non-neurologically impaired individuals matched for age and sex. In addition, the study investigated 16 participants with PD who did not undergo neurosurgical management to control for disease progression. Results revealed that neurosurgical intervention did not significantly change the surgical participants' perceptual speech dimensions or oromotor function despite significant postoperative improvements in ratings of general motor function and disease severity. Reasons why neurosurgical intervention resulted in dissimilar outcomes with respect to participants' perceptual speech dimensions and general motor function are proposed.

KEY WORDS: Parkinson's disease, dysarthria, neurosurgery

Submitted on August 20, 2003
Accepted on May 3, 2004


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