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Journal of Speech and Hearing Research Vol.32 611-624 September 1989.
© American Speech-Language-Hearing Association
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Phonatory Reaction Times of Rheumatoid Arthritic and Normal Females

Barbara Mathers-Schmidt 1
Alan Reich 1
1 University of Washington

This study examined the degree to which rheumatoid arthritis affects a speaker's ability to accomplish rapid vocal fold adjustments. The phonatory initiation, phonatory termination, and manual reaction times of 14 rheumatoid arthritic (RA) and 14 normal (NL) speakers were compared during a morning and an afternoon session. In addition, electroglottographic (EGG) measures (0 Hz-10 kHz bandwidth and 30 Hz-10 kHz bandwidth) allowed us to explore the components of each subject's reaction times. For two speech reaction-time tasks, temporal measures that reflected primarily mechanical adjustments of the vocal folds were significantly longer in the RA group than in the NL group. The two groups also differed significantly on manual response time, phonatory initiation time, and medial movement initiation time. Neither group displayed evidence of laryngeal morning stiffness.

KEY WORDS: rheumatoid arthritis, laryngeal arthritis, joint disease, phonatory reaction time, electroglottography

Submitted on April 18, 1988
Accepted on December 16, 1988






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