The interplay between dynamics and muscle activation in the tongue during speech

Carolyn Essex-Torcaso, William S. Levine, Emi Z. Murano, Maureen Stone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The human tongue is used in speaking, an activity unique to humans. The tongue is unusual in that it does not contain any rigid structure, such as a bone, for its muscles to act against. In an effort to better understand the biomechanics and control of the tongue, a mathematical model has been created. This model is in the form of a nonlinear controllable incompressible elastic structure that undergoes large deformations. The model was then used to solve a simplified inverse problem. The trajectories of arbitrary points within the tongue were obtained by means of tagged cine MRI. This data was then used as input to a two-dimensional simplification of the model. The output was the set of muscle activations that produced the best approximation to the observed motion in a least squares sense. This results in information relevant to two biological questions-How many independently controllable motor units are there in the tongue? How important are the dynamics of the tongue in determining its shape?.

Original languageEnglish (US)
Title of host publicationISSP 2006 - Proceedings of the 7th International Seminar on Speech Production
PublisherCEFALA
Pages175-182
Number of pages8
ISBN (Print)8599598023, 9788599598023
StatePublished - Jan 1 2006
Event7th International Seminar on Speech Production, ISSP 2006 - Ubatuba, Brazil
Duration: Dec 13 2006Dec 15 2006

Publication series

NameISSP 2006 - Proceedings of the 7th International Seminar on Speech Production

Other

Other7th International Seminar on Speech Production, ISSP 2006
CountryBrazil
CityUbatuba
Period12/13/0612/15/06

ASJC Scopus subject areas

  • Speech and Hearing

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