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Journal of Speech, Language, and Hearing Research Vol.46 164-177 February 2003. doi:10.1044/1092-4388(2003/013)
© American Speech-Language-Hearing Association
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Respiratory Sinus Arrhythmia During Speech Production

Kevin J. Reilly 1
Christopher A. Moore 1
1 University of Washington Seattle

kjreilly{at}u.washington.edu

The amplitude of the respiratory sinus arrhythmia (RSA) was investigated during a reading aloud task to determine whether alterations in respiratory control during speech production affect the amplitude of RSA. Changes in RSA amplitude associated with speech were evaluated by comparing RSA amplitudes during reading aloud with those obtained during rest breathing. A third condition, silent reading, was included to control for potentially confounding effects of cardiovascular responses to cognitive processes involved in the process of reading. Calibrated respiratory kinematics, electrocardiograms (ECGs), and speech audio signals were recorded from 18 adults (9 men, 9 women) during 5-min trials of each condition. The results indicated that the increases in respiratory duration, lung volume, and inspiratory velocity associated with reading aloud were accompanied by similar increases in the amplitude of RSA. This finding provides support for the premise that sensorimotor pathways mediating metabolic respiration are actively modulated during speech production.

KEY WORDS: respiration, speech motor control, heart rate, reflexes, speech production

Submitted on March 5, 2002
Accepted on August 4, 2002




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