Ankle Biomichanic

Biomechanical Analysis of Ankle Kinematics and Ligament Strain in Snowboarding By Sébastien Delorme A Thesis submitted to The University of Ottawa in partial fulfillment of the Requirement for the Doctor of Philosophy in robotic Engineering January 2004 incision of mechanised Engineering, University of Ottawa Ottawa-Carleton Institute for Mechanical and Aerospace Engineering © Sébastien Delorme Abstract Because snowboarders ar know to injure their mortise articulates more often than alpine skiers, it has been postulated that stiffer snowboard boots would evolve into account better protection to the ankle joint ligaments than current compressible boots do. To outpouring this hypothesis, we have measured the kinematics of the feet and lower legs of five buck bill snowboarders riding overmaster a course of 10 gates on a ski hill apply an electromagnetic motion bring in system. Results were obtained with each snowboarder have on soft boots and s tiffer interchange boots. The measurements were expressed in anatomically pertinent rotations of the ankle join complex.

Two models were develop to bespeak ligament strains from rotations of the ankle joint complex: 1) a statistical model victimisation published ligament strain measured on cadaver specimens at various combinations of ankle rotations as an intromission and extrapolation table to predict strains in two ankle ligaments at the rotations measured during the snowboarding trials; 2) a personalized 2-degrees-of-freedom kinematic model of the ankle joint complex, based on the Denavit-Hartenberg formulat ion of serial-link manipulators, to predict ! strains in five ankle ligaments from the relation position of the shank and foot. The experimental results showed that the odd and right ankles ar asymmetrically rotated, mostly in dorsiflexion, eversion and external rotation. Compared to step-in boots and bindings, soft boots and strap bindings allowed more rotation of the ankle joint complex and more strain in the preliminary talofibular ligament, harmonize to the...If you want to get a full essay, nightclub it on our website: BestEssayCheap.com

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