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Journal of Speech and Hearing Research Vol.33 123-133 March 1990.
© American Speech-Language-Hearing Association
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Rapid Manual Abilities in Spasmodic Dysphonic and Normal Female Subjects

Michael P. Cannito 1
George V. Kondraske 2
1 Department of Speech Communication, University of Texas at Austin
2 Human Performance Institute, University of Texas at Arlington

This study quantitatively examined upper extremity motor performance in 18 spasmodic dysphonic females, in comparison to matched normal controls, across variables of finger lift reaction time, index finger tapping speed, and peg placing (Purdue Pegboard) speed. Significant differences were noted for both upper extremities on the finger tapping and pegboard tasks, with better performance by the controls. A linear combination of these manual variables was able to discriminate the spasmodic dysphonic from matched normal subjects with 78% accuracy. Motor performance was uncorrelated with psychometric measures of anxiety and depression in both groups. The dysphonic subjects exhibited a significant correlation between nondominant finger tapping speed and severity ratings of motor speech impairment. Possible localizing significance of these findings is discussed.

KEY WORDS: spasmodic dysphonia, manual abilities, neuromotor function, quantification

Submitted on January 30, 1989
Accepted on August 25, 1989


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