Abstract
The purpose of this study was to design, implement, and validate a methodology to determine baseline measures during the preparation phase (PREP) of seated weight-bearing locomotion. In order to evaluate this methodology this study investigated the external movement produced by the shoulder joint-centre of the upper limb through a seated downward poling motion. A solid-static anatomically correct prototype was designed to produce isolated dynamic movement about a human’s shoulder joint-centre; this particular investigation replicated the average male weighing 80kg having fixed elbow (135o) and wrist-stick (45°) angles, and dynamic shoulder start angles (-10°, 0° and +10° to the horizon). The prototype was tasked to produce PREP; a phase identified in seated locomotion produced through a double poling fashion. Trajectory and reaction forces created through PREP were evaluated using a standard Newton-Euler mathematical model in conjunction with a 3-dimensional motion capture system and force plate. Trajectory data concluded that the prototype was of reliable and valid mechanical design producing near identical curves for all trials individually as well as combined averages. Evidence also indicated that all trials displayed similar reaction forces, which produced torque in an anticlockwise direction about the shoulder. Since the prototype is solid and designed to mimic the male upper limb data can be used to describe minimal reaction forces onto the shoulder joint produced from PREP. Understanding external forces at baseline measures allows for valid assumptions to be made or dismissed concerning internal forces within the human body. Dynamic biomechanical analysis requires assumptions involving internal and external parameters when producing a movement. The addition of PREP to the seated propulsion cycle is unclear identifying the need to investigate the biomechanics produced through this phase; full arm extension to pick-plant. This study has developed an improved model of the upper limb during seated double poling.
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© 2015 Springer International Publishing Switzerland
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Gal, A.M., Chan, A.D.C., Hay, D.C. (2015). Validating a Solid-Static Single-Armed Male Prototype Tasked to Produce Dynamic Movement from the Shoulder Through the Preparation Phase. In: Jaffray, D. (eds) World Congress on Medical Physics and Biomedical Engineering, June 7-12, 2015, Toronto, Canada. IFMBE Proceedings, vol 51. Springer, Cham. https://doi.org/10.1007/978-3-319-19387-8_278
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DOI: https://doi.org/10.1007/978-3-319-19387-8_278
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-19386-1
Online ISBN: 978-3-319-19387-8
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