The Dynamics of Interlip Coupling in Speakers With a Repaired Unilateral Cleft-Lip History In this paper, data are presented on individual movement characteristics of the upper and lower lip and on interlip coordination in speakers with a repaired unilateral cleft upper lip history and age-matched control participants. The data were acquired using the AG100 EMMA system while the participants produced a selection of ... Research Article
Research Article  |   February 01, 2002
The Dynamics of Interlip Coupling in Speakers With a Repaired Unilateral Cleft-Lip History
 
Author Affiliations & Notes
  • P. H. H. M. van Lieshout, PhD
    Graduate Department of Speech-Language Pathology Oral Dynamics Lab University of Toronto Toronto, Ontario, Canada
  • C. A. W. Rutjens
    Plastic and Reconstructive Surgery and Hand Surgery University Hospital St. Radboud Nijmegen, The Netherlands
  • P. H. M. Spauwen
    Plastic and Reconstructive Surgery and Hand Surgery University Hospital St. Radboud Nijmegen, The Netherlands
  • Contact author: Pascal H. H. M. van Lieshout, PhD, University of Toronto, Graduate Department of Speech-Language Pathology, Oral Dynamics Lab, 6 Queen's Park Crescent West, Toronto, ON M5S 3H2. E-mail: p.vanlieshout@utoronto.ca
Article Information
Special Populations / Genetic & Congenital Disorders / Speech / Research Articles
Research Article   |   February 01, 2002
The Dynamics of Interlip Coupling in Speakers With a Repaired Unilateral Cleft-Lip History
Journal of Speech, Language, and Hearing Research, February 2002, Vol. 45, 5-19. doi:10.1044/1092-4388(2002/001)
History: Received March 8, 2001 , Accepted October 1, 2001
 
Journal of Speech, Language, and Hearing Research, February 2002, Vol. 45, 5-19. doi:10.1044/1092-4388(2002/001)
History: Received March 8, 2001; Accepted October 1, 2001

In this paper, data are presented on individual movement characteristics of the upper and lower lip and on interlip coordination in speakers with a repaired unilateral cleft upper lip history and age-matched control participants. The data were acquired using the AG100 EMMA system while the participants produced a selection of nonspeech and speech tasks. The participants with a repaired unilateral cleft upper lip history showed reduced upper-lip movement ranges and peak velocities and a more variable spatiotemporal pattern for individual upper-lip movement cycles, in addition to a more variable interlip coupling. The latter difference also proved to be more pronounced for the younger speakers with a repaired cleft upper lip. Overall, for both groups, the linguistically more complex task showed more variability in the individual upper- and lower-lip movement cycles and their coupling. In the discussion, we address the potential relationships between the kinematic data for upper lip in the repaired-cleft-lip speakers and the findings on movement and coordination stability as they might fit within current notions of coordination dynamics theory.

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