We are extending our biomechanics simulation toolkit, ArtiSynth (Fels 2006), with new methods rel... more We are extending our biomechanics simulation toolkit, ArtiSynth (Fels 2006), with new methods relevant to surgical planning. Our research directions are focused on upper-airway and cranio-facial anatomy and predicting functional deficits associated with jaw surgery, such as mandible reconstruction (Curtis et al. 1997). The principle features of ArtiSynth include simulation of constrained rigid-bodies, fast finite-element methods for deformable bodies, contact
We have improved the ArtiSynth biomechanical modeling toolkit to meet new challenges in oral, pha... more We have improved the ArtiSynth biomechanical modeling toolkit to meet new challenges in oral, pharyngeal and laryngeal modeling. Our team’s current research eorts have focused on four important developments: 1. patient specific modeling, 2. updating the ArtiSynth simulation engine to support integrated soft and hard tissue models, 3. inverse modeling techniques and 4. computational fluid dynamics for air and
We describe the process of using ArtiSynth, a 3D biomechanical sim- ulation platform, to build mo... more We describe the process of using ArtiSynth, a 3D biomechanical sim- ulation platform, to build models of the vocal tract and upper airway which are capable of simulating speech sounds. ArtiSynth allows mass-spring, finite ele- ment, and rigid body models of anatomical components (such as the face, jaw, tongue, and pharyngeal wall) to be connected to various acoustical models (in-
Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2014
A finite element method (FEM) based numerical model of upper airway structures (jaw, tongue, maxi... more A finite element method (FEM) 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. Further, 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 a modular view of speech motor control. As off-midline structures of the OPI are difficult to observe during speech production, biomechanical simulation offers a promising approach to studying these structures.
This tribute article to Professor Alan G. Hannam is based on 7 presentations for him at the July ... more This tribute article to Professor Alan G. Hannam is based on 7 presentations for him at the July 1, 2008 symposium honoring 3 "giants" in orofacial neuroscience: Professors B. J. Sessle, J. P. Lund, and A. G. Hannam. This tribute to Hannam's outstanding career draws examples from his 40-year academic career and spans topics from human evolution to complex modeling of the craniomandibular system. The first presentation by W. Hylander provides a plausible answer to the functional and evolutionary significance of canine reduction in hominins. The second presentation, by A. McMillan, describes research activities in the field of healthy aging, including findings that intensity-modulated radiotherapy improves the health condition and quality of life of people with nasopharyngeal carcinoma in comparison to conventional radiotherapy. The developments in dental imaging are summarized in the third paper by E. Lam, and an overview of the bite force magnitude and direction while ...
We are extending our biomechanics simulation toolkit, ArtiSynth (Fels 2006), with new methods rel... more We are extending our biomechanics simulation toolkit, ArtiSynth (Fels 2006), with new methods relevant to surgical planning. Our research directions are focused on upper-airway and cranio-facial anatomy and predicting functional deficits associated with jaw surgery, such as mandible reconstruction (Curtis et al. 1997). The principle features of ArtiSynth include simulation of constrained rigid-bodies, fast finite-element methods for deformable bodies, contact
We have improved the ArtiSynth biomechanical modeling toolkit to meet new challenges in oral, pha... more We have improved the ArtiSynth biomechanical modeling toolkit to meet new challenges in oral, pharyngeal and laryngeal modeling. Our team’s current research eorts have focused on four important developments: 1. patient specific modeling, 2. updating the ArtiSynth simulation engine to support integrated soft and hard tissue models, 3. inverse modeling techniques and 4. computational fluid dynamics for air and
We describe the process of using ArtiSynth, a 3D biomechanical sim- ulation platform, to build mo... more We describe the process of using ArtiSynth, a 3D biomechanical sim- ulation platform, to build models of the vocal tract and upper airway which are capable of simulating speech sounds. ArtiSynth allows mass-spring, finite ele- ment, and rigid body models of anatomical components (such as the face, jaw, tongue, and pharyngeal wall) to be connected to various acoustical models (in-
Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2014
A finite element method (FEM) based numerical model of upper airway structures (jaw, tongue, maxi... more A finite element method (FEM) 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. Further, 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 a modular view of speech motor control. As off-midline structures of the OPI are difficult to observe during speech production, biomechanical simulation offers a promising approach to studying these structures.
This tribute article to Professor Alan G. Hannam is based on 7 presentations for him at the July ... more This tribute article to Professor Alan G. Hannam is based on 7 presentations for him at the July 1, 2008 symposium honoring 3 "giants" in orofacial neuroscience: Professors B. J. Sessle, J. P. Lund, and A. G. Hannam. This tribute to Hannam's outstanding career draws examples from his 40-year academic career and spans topics from human evolution to complex modeling of the craniomandibular system. The first presentation by W. Hylander provides a plausible answer to the functional and evolutionary significance of canine reduction in hominins. The second presentation, by A. McMillan, describes research activities in the field of healthy aging, including findings that intensity-modulated radiotherapy improves the health condition and quality of life of people with nasopharyngeal carcinoma in comparison to conventional radiotherapy. The developments in dental imaging are summarized in the third paper by E. Lam, and an overview of the bite force magnitude and direction while ...
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Papers by Ian Stavness