The effects of muscle aging on hyoid motion during swallowing : a study using a 3D biomechanical model
department or school: Applied Science, Faculty of
department or school: Electrical and Computer Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Tsou, Ling
issued: 2012-06-27T17:49:45Z
issued: 2012
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: The ability to swallow is crucial in maintaining adequate nutrition. However, there is a high prevalence of dysphagia among the elderly and a high associated mortality rate. To study the various causes of the associated physiological changes, one must first understand the biomechanics of normal swallowing. However, functional studies of the anatomically complex head and neck region can prove to be difficult due to both technical and ethical reasons. To overcome the limitations of clinical studies, this thesis proposes the use of a 3D computer model for performing dynamic simulations. A state-of-the-art model of the hyolaryngeal complex was created for simulating swallowing-related motor tasks with a special focus on hyoid excursion since reduced hyoid motion is a major indicator of oropharyngeal dysphagia. The model was constructed using anatomical data for a male cadaver from the Visible Human Project and an open-source dynamic simulation platform, ArtiSynth. Hyoid motion data obtained from videofluoroscopy of subjects performing normal swallowing was applied to the model for inversely simulating the potential muscle activities of the extrinsic laryngeal muscles during hyoid excursion. Within a specific range, the model demonstrated the ability to reproduce realistic hyoid motion for swallowing. Selective usage of suprahyoid muscles was also examined and was found to be possible in achieving adequate hyoid excursion for successful swallows. Finally, this study investigated the relationship between muscle weakening and hyoid range of motion using the hyolaryngeal model. Loss of muscle strength is characteristic of the aging process. Simulation of the maximum hyoid displacement under various muscle conditions confirmed a nonlinear reduction in the hyoid motion range under a linear decline in muscle strength. With an assumed rate of muscle weakening, the proportion of hyoid range reduction was estimated for a person at various ages. The results suggest that severe mus…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/42559
note: The effects of muscle aging on hyoid motion during swallowing: A study using a 3D biomechanical model by Ling Tsou B.Eng., McMaster University, 2009 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in The Faculty of Graduate Studies (Electrical and Computer Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) June 2012 c© Ling Tsou 2012 Abstract The ability to swallow is crucial in maintaining adequate nutrition. How- ever, there is a high prevalence of dysphagia among the elderly and a high associated mortality rate. To study the various causes of the associated phys- iological changes, one must first understanding the biomechanics of normal swallowing. However, functional studies of the anatomically complex head and neck region can prove to be difficult due to both technical and ethical reasons. To overcome the limitations of clinical studies, this thesis proposes the use of a 3D computer model for performing dynamic simulations. A state- of-the-art model of the hyolaryngeal complex was created for simulating swallowing-related motor tasks with a special focus on hyoid excursion since reduced hyoid motion is a major indicator of oropharyngeal dysphagia. The model was constructed using anatomical data for a male cadaver from the Visible Human Project c© and an open-source dynamic simulation platform, ArtiSynth. Hyoid motion data obtained from videofluoroscopy of subjects perform- ing normal swallowing was applied to the model for inversely simulating the potential muscle activities of the extrinsic laryngeal muscles during hyoid excursion. Within a specific range, the model demonstrated the ability to reproduce realistic hyoid motion for swallowing. Selective usage of suprahy- oid muscles was also examined and was found to be possible in achieving adequate hyoid excursion for successful swallows. Finally, this study investigated the relationship between muscle weak- ening and hyoid range of motion usin…
has type: Thesis/Dissertation
date issued: 2012-11
is shown at: 10.14288/1.0072854
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/42559