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KMID : 0917520080150020177
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Journal of Speech Sciences
2008 Volume.15 No. 2 p.177 ~ p.189
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A Study on the Aerodynamic and Acoustic Characteristics in Dysarthria Speakers’ Diadochokinesis by Articulation Valves in Vocal Tract
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Park Hee-June
Kwon Soon-Bok
Jeong Ok-Ran
Wang Soo-Geun
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Abstract
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This study was to investigate diadochokinetic (DDK) rate, regularity and mean flow rate of articulation valves in dysarthria. DDK rate, mean airflow rate (MFR) and regularity of DDK syllable repetitions of vocal function /ihi/, tongue function /ta/, velopharyngeal function /bm/, and labial function /pa/ in 24 normal and dysarthric speakers were measured. Aerophone Ⅱ and Motor Speech Profile were used for data recording and analysis. The results of the findings were as follows: First, there were significant differences between the dysarthria and the normal group in DDK rate. DDK rates in ataxic dysarthria were the lowest and spastic, flaccid, and hypokinetic dysarthria followed in sequence. Second, there was a significant difference between the dysarthria and the normal group in DDK regularity. Third, there was a significant difference between dysarthria groups and normal group in DDK MFR. Finally, there was a significant difference between the 4 groups of dysarthria and the normal group in DDK air flow tracking. The results of this study can be guidelines for normal DDK rate, regularity and flow rate in dysarthria groups. In addition, their differential diagnoses and descriptions are important to make a decision on medical and behavioral management of the individuals with disorders according to DDK characteristics.
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KEYWORD
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dysarthria, diadochokinetic, articulation valve, vocal tract
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