A 3D dynamical biomechanical tongue model to study speech motor control

A 3D biomechanical dynamical model of human tongue is presented, that is elaborated in the aim to test hypotheses about speech motor control. Tissue elastic properties are accounted for in Finite Element Modeling (FEM). The FEM mesh was designed in order to facilitate the implementation of muscle arrangement within the tongue. Therefore, its structure was determined on the basis of accurate anatomical data about the tongue. Mechanically, the hypothesis of hyperelasticity was adopted with the Mooney-Rivlin formulation of the strain energy function. Muscles are modeled as general force generators that act on anatomically specified sets of nodes of the FEM structure. The 8 muscles that are known to be largely involved in the production of basic speech movements are modeled. The model and the solving of the Lagrangian equations of movement are implemented using the ANSYSTM software. Simulations of the influence of muscle activations onto the tongue shape are presented and analyzed.

[1]  J. Dang,et al.  Estimation of vocal tract shapes from speech sounds with a physiological articulatory model , 2002, J. Phonetics.

[2]  R. Wilhelms-Tricarico.  Physiological modeling of speech production: methods for modeling soft-tissue articulators. , 1995, The Journal of the Acoustical Society of America.

[3]  F. Netter.  Atlas of Human Anatomy , 1967 .

[4]  Nicholas T. Zervas,et al.  Book ReviewEduard Pernkopf Atlas of Topographical and Applied Human Anatomy. Vol. 1. Head and neck , 1980 .

[5]  D J Ostry,et al.  A dynamic biomechanical model for neural control of speech production. , 1998, The Journal of the Acoustical Society of America.

[6]  H. Saunders,et al.  Finite element procedures in engineering analysis , 1982 .

[7]  J. Perkell,et al.  Influences of tongue biomechanics on speech movements during the production of velar stop consonants: a modeling study. , 2003, Journal of the Acoustical Society of America.

[8]  J. E. Miller,et al.  Computational model of the tongue , 1975 .

[9]  Pascal Perrier,et al.  The role of the palate in tongue kinematics: an experimental assessment in v sequences from EPG and EMMA data , 2001, INTERSPEECH.

[10]  V J Napadow,et al.  Intramural mechanics of the human tongue in association with physiological deformations. , 1999, Journal of biomechanics.

[11]  R. Ogden.  Large deformation isotropic elasticity – on the correlation of theory and experiment for incompressible rubberlike solids , 1972, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[12]  E M Arruda,et al.  Finite element modeling of human skin using an isotropic, nonlinear elastic constitutive model. , 2000, Journal of biomechanics.

[13]  J. Z. Zhu,et al.  The finite element method , 1977 .

[14]  J. Manschot,et al.  The measurement and modelling of the mechanical properties of human skin in vivo--I. The measurement. , 1986, Journal of biomechanics.

[15]  Steven J. Owen,et al.  A Survey of Unstructured Mesh Generation Technology , 1998, IMR.

[16]  Y M Barnwell,et al.  The anatomy of the intrinsic musculature of the tongue in the early human fetus: part 1, M. longitudinalis superior. , 1978, The International journal of oral myology.

[17]  O. Fujimura,et al.  Computation of mapping from muscular contraction patterns to formant patterns in vowel space , 1983 .

[18]  Renato Perucchio,et al.  Modeling Heart Development , 2000 .

[19]  Ian Whitmore,et al.  Textbook of Functional Anatomy of Speech, Language and Hearing , 1986 .

[20]  G. Doran,et al.  The genioglossus muscle: a reassessment of its anatomy in some mammals, including man. , 1971, Journal of anatomy.

[21]  D J Ostry,et al.  Are complex control signals required for human arm movement? , 1998, Journal of neurophysiology.

[22]  J. Perkell.  Physiology of speech production: results and implications of a quantitative cineradiographic study , 1969 .

[23]  H. Takemoto,et al.  Morphological analyses of the human tongue musculature for three-dimensional modeling. , 2001, Journal of speech, language, and hearing research : JSLHR.

[24]  C. V. van Donkelaar,et al.  Skeletal muscle transverse strain during isometric contraction at different lengths. , 1999, Journal of biomechanics.

[25]  Barnwell Ym,et al.  The anatomy of the intrinsic musculature of the tongue in the early human fetus: part II, M. longitudinalis inferior. , 1978 .

[26]  Shinsuke Suga,et al.  Estimation of the muscular tensions of the human tongue by using a three-dimensional model of the tongue. , 1986 .

[27]  M R Drost,et al.  Passive transverse mechanical properties of skeletal muscle under in vivo compression. , 2001, Journal of biomechanics.

[28]  K. Honda.  Organization of tongue articulation for vowels , 1996 .

[29]  Yohan Payan,et al.  A control model of human tongue movements in speech , 1997, Biological Cybernetics.

[30]  Mitsuo Kawato,et al.  Equilibrium-Point Control Hypothesis Examined by Measured Arm Stiffness During Multijoint Movement , 1996, Science.

[31]  M. Mooney.  A Theory of Large Elastic Deformation , 1940 .

[32]  Yohan Payan,et al.  Synthesis of V-V sequences with a 2D biomechanical tongue model controlled by the Equilibrium Point Hypothesis , 1997, Speech Commun..