Speech function of the oropharyngeal isthmus: a modelling study

A finite element method-based numerical model of upper airway structures (jaw, tongue, maxilla, soft palate) was implemented to observe interactions between the soft palate and tongue, and, in particular, to distinguish the contributions of individual muscles in producing speech-relevant constrictions of the oropharyngeal isthmus (OPI) or ‘uvular’ region of the oral tract. Simulations revealed a sphincter-like general operation for the OPI, particularly with regard to the function of the palatoglossus muscle. Furthermore, as has been observed with the lips, the OPI can be controlled by multiple distinct muscular mechanisms, each reliably producing a different-sized opening and robust to activation noise suggestive of modular motor control for speech. As off-midline structures of the OPI are difficult to observe during speech production, biomechanical simulation offers a promising approach to studying these structures.

[1]  Reza Shaker,et al.  Manometric characteristics of glossopalatal sphincter , 1990, Digestive Diseases and Sciences.

[2]  I. Stavness,et al.  Modularizing speech , 2013, Front. Psychol..

[3]  Hui Chen,et al.  Three-dimensional reconstruction of soft palate modeling from subject-specific magnetic resonance imaging data , 2012, Sleep and Breathing.

[4]  E. Perreault,et al.  Modeling short-range stiffness of feline lower hindlimb muscles. , 2008, Journal of biomechanics.

[5]  Osamu Fujimura,et al.  Comments on “On the Quantal Nature of Speech”, by K. N. Stevens , 1989 .

[6]  D. Kuehn,et al.  Anatomical characteristics of palatoglossus and the anterior faucial pillar. , 1978, The Cleft palate journal.

[7]  B. Fritzell,et al.  The velopharyngeal muscles in speech. An electromyographic and cinéradiographic study. , 1969, Acta oto-laryngologica.

[8]  Jamie L Perry,et al.  Anatomy and physiology of the velopharyngeal mechanism. , 2011, Seminars in speech and language.

[9]  D P Kuehn,et al.  Relationships between muscle activity and velar position. , 1982, The Cleft palate journal.

[10]  Anthony Jarc,et al.  Simplified and effective motor control based on muscle synergies to exploit musculoskeletal dynamics , 2009, Proceedings of the National Academy of Sciences.

[11]  Kiyoshi Honda,et al.  An MRI analysis of the extrinsic tongue muscles during vowel production , 2007, Speech Commun..

[12]  Kenneth N. Stevens,et al.  On the quantal nature of speech , 1972 .

[13]  Sidney Fels,et al.  Categorical variation in lip posture is determined by quantal biomechanical-articulatory relations , 2011 .

[14]  D P Kuehn,et al.  A finite element model of the soft palate. , 1999, The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association.

[15]  Yang Gao,et al.  Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization , 2015 .

[16]  Andrea d'Avella,et al.  Differences in Adaptation Rates after Virtual Surgeries Provide Direct Evidence for Modularity , 2013, The Journal of Neuroscience.

[17]  S. Fels,et al.  Biomechanical modeling of English /r/ variants. , 2012, The Journal of the Acoustical Society of America.

[18]  J. Hogg.  Magnetic resonance imaging. , 1994, Journal of the Royal Naval Medical Service.

[19]  Yingxi Liu,et al.  Fluid–structure interaction modeling of upper airways before and after nasal surgery for obstructive sleep apnea , 2012, International journal for numerical methods in biomedical engineering.

[20]  Fredericka Bell‐Berti,et al.  Patterns of Palatoglossus Activity and Their Implications for Speech Organization , 1973 .

[21]  Yohan Payan,et al.  Coupled hard–soft tissue simulation with contact and constraints applied to jaw–tongue–hyoid dynamics , 2011 .

[22]  F Bell-Berti,et al.  An electromyographic study of velopharyngeal function in speech. , 1976, Journal of speech and hearing research.

[23]  E J Seaver,et al.  A cineradiographic and electromyographic investigation of velar positioning in non-nasal speech. , 1980, The Cleft palate journal.

[24]  A G Hannam,et al.  Dynamic simulation of muscle and articular properties during human wide jaw opening. , 2000, Archives of oral biology.

[25]  M. Stone.  A three-dimensional model of tongue movement based on ultrasound and x-ray microbeam data. , 1990, The Journal of the Acoustical Society of America.

[26]  Masayuki Sawashima,et al.  Velar coarticulation in French: an electromyographic study , 1977 .

[27]  S. Giszter,et al.  Output Units of Motor Behavior: An Experimental and Modeling Study , 2000, Journal of Cognitive Neuroscience.

[28]  Noam Alperin,et al.  Magnetic resonance imaging of the levator veli palatini muscle during speech. , 2002, The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association.

[29]  Yohan Payan,et al.  3D biomechanical tongue modeling to study speech production , 2006 .

[30]  J W Folkins,et al.  Coordination of velopharyngeal muscle activity during positioning of the soft palate. , 1994, The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association.

[31]  A. Serrurier,et al.  A three-dimensional articulatory model of the velum and nasopharyngeal wall based on MRI and CT data. , 2008, The Journal of the Acoustical Society of America.

[32]  Bryan Gick,et al.  The velic traverse: an independent oral articulator? , 2013, The Journal of the Acoustical Society of America.

[33]  A G Hannam,et al.  Deformation of the Human Mandible During Simulated Tooth Clenching , 1994, Journal of dental research.

[34]  H. P. Lee,et al.  Snoring source identification and snoring noise prediction. , 2007, Journal of biomechanics.

[35]  B Fritzell.  Electromyography in the study of the velopharyngeal function--a review. , 1979, Folia phoniatrica.

[36]  James F. Lubker,et al.  Palatoglossus Function in Normal Speech Production—Electromyographic Implications , 1973 .

[37]  André Rigault,et al.  Velopharyngeal Function: An Electromyographic Study , 1972 .

[38]  Atul Malhotra,et al.  The impact of anatomic manipulations on pharyngeal collapse: results from a computational model of the normal human upper airway. , 2005, Chest.

[39]  P. Perrier,et al.  Shaping by stiffening: a modeling study for lips. , 2011, Motor control.

[40]  F. Zajac.  Muscle and tendon: properties, models, scaling, and application to biomechanics and motor control. , 1989, Critical reviews in biomedical engineering.