Articulatory function in hypokinetic dysarthria: An electropalatographic examination of two cases

McAuliffe, M. J., Ward, E. C. and Murdoch, B. E. (2005) Articulatory function in hypokinetic dysarthria: An electropalatographic examination of two cases. Journal of Medical Speech-language Pathology, 13 2: 149-168.

Author McAuliffe, M. J.
Ward, E. C.
Murdoch, B. E.
Title Articulatory function in hypokinetic dysarthria: An electropalatographic examination of two cases
Journal name Journal of Medical Speech-language Pathology   Check publisher's open access policy
ISSN 1065-1438
Publication date 2005
Sub-type Article (original research)
Volume 13
Issue 2
Start page 149
End page 168
Total pages 21
Editor Leonard LaPointe
Place of publication USA
Publisher Thompson Delmar Learning
Collection year 2005
Language eng
Subject C1
321025 Rehabilitation and Therapy - Hearing and Speech
730303 Occupational, speech and physiotherapy
730111 Hearing, vision, speech and their disorders
Abstract The present study employed electropalatography (EPG) and a nonspeech measure of lingual function to examine, in detail, the articulatory production deficits of two individuals with Parkinson disease (PD) and hypokinetic dysarthria. Participants read 10 repetitions of CV words contained within the carrier phrase I saw a _ today while wearing an EPG artificial palate. Target consonants included the alveolar stop /t/, lateral approximant /l/, and the alveolar fricative /s/ in the /a/ vowel environment. The results of the two participants were compared to an age-matched control group. Examination of the perceptual features of articulatory production, lingual strength, fine force control and endurance, tongue-palate contact patterns, and segment durations were conducted. Results of the study revealed quite different articulatory deficits in the two participants. Specifically, the articulation of Participant One (P1) was characterized by a fast rate of speech, undershooting of articulatory targets, and reduced duration of consonant closures. In contrast, Participant Two (P2) demonstrated tongue-palate contact patterns indicative of impaired lingual control in the presence of both normal and increased articulatory segment durations. Potential reasons for the differing articulatory deficits were hypothesized. The current study demonstrated that assessment with EPG identified potential causes of consonant imprecision in two individuals with hypokinetic dysarthria. Directions for speech pathology intervention, salient from the results of the study, were also noted.
Keyword Clinical Neurology
Traumatic Brain-injury
Parkinsons-disease
Kinematic Analysis
Electromagnetic Articulography
Speech Characteristics
Tongue
Movements
Disorders
Reduction
Strength
Q-Index Code C1

 
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