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Modelling Dynamic Postural Stability Margins during Fixed-Support Balance Recovery

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dc.contributor.advisor Vallis, Lori Ann Inkol, Keaton 2018-08-10T15:28:58Z 2018-08-10T15:28:58Z 2018-07 2018-07-20 2018-08-10
dc.description.abstract This dissertation is an investigation into the use of whole-body center of mass (CoM) dynamics for evaluation of balance control following robotic platform perturbations evoking fixed base of support postural strategies. Two primary purposes were identified: i) ascertain the effects of anthropometric model reductions on estimations of extrapolated CoM-based margins of stability (MoS); and ii) develop a biomechanical model to evaluate changes in dynamic MoS when accounting for both a counterbalance postural strategy and platform perturbation. Experimental data collection and analyses (kinematics) of young adults responding to perturbations in addition to forward dynamics simulations of the proposed model suggested the following: i) the degree of anthropometric simplicity sufficient for CoM estimates depends on the perturbations utilized; ii) counterbalance strategies produce a larger feasible MoS relative to those derived using an inverted pendulum model. Thus, these findings highlight the importance of considering the postural task/mechanics when using CoM based stability metrics. en_US
dc.description.sponsorship Dr. Lori Ann Vallis: NSERC Discovery Grant; Keaton Inkol: Ontario Graduate Student scholarship, NSERC summer student fellowship, NSERC Canada Graduate Scholarship - Master's. en_US
dc.language.iso en en_US
dc.rights Attribution-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject balance control en_US
dc.subject extrapolated centre of mass en_US
dc.subject margin of stability en_US
dc.subject trajectory optimization en_US
dc.subject support-surface perturbations en_US
dc.subject dynamic stability en_US
dc.subject biomechanical modelling en_US
dc.title Modelling Dynamic Postural Stability Margins during Fixed-Support Balance Recovery en_US
dc.type Thesis en_US Human Health and Nutritional Sciences en_US Master of Science en_US Department of Human Health and Nutritional Sciences en_US
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Attribution-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NoDerivs 2.5 Canada