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Rib Torque Does Not Assist Resting Tidal Expiration or Most Conversational Speech Expiration

Contact author: Thomas J. Hixon, National Center for Neurogenic Communication Disorders, Department of Speech, Language, and Hearing Sciences, University of Arizona, Tucson, AZ 85721. Email: hixon{at}u.arizona.edu

PURPOSE: This research note discusses a common misconception in speech science and speech-language pathology textbooks that rib torque (i.e., rotational stress) assists resting tidal expiration and conversational speech production.

METHOD: The nature of this misconception is considered.

CONCLUSION: An alternate conceptualization is offered that is consistent with knowledge from respiratory biomechanics.

KEY WORDS: breathing, speech breathing, respiratory biomechanics

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