CourseProject - Course Project Professor B.J Fregly...

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Course Project Professor B.J. Fregly Mechanics of the Human Locomotor System EML 5595 - Fall 2010 Project Developer: B.J. Fregly, Computational Biomechanics Lab, University of Florida I. Overview This course project will give you the opportunity to analyze the human musculoskeletal system performing a real life athletic task – kicking a soccer ball. The purpose of the project is to combine as many concepts from the course as possible into a single project that will allow you to see “how all the pieces fit together.” My hope is that by the end of the project, you will have a solid understanding of how kinematics, dynamics, geometric modeling, forward and inverse dynamics, and optimization all play an important role in the analysis of the human musculoskeletal system. The course project is much more similar to an actual research project than to a homework assignment. Thus, you will encounter problems along the way that the instructor will not necessarily know how to resolve. You will therefore need to use the same skills necessary to perform successfully in a research lab – creativity, ingenuity, tenacity, and resourcefulness. OpenSim user manuals, OpenSim tutorials, the OpenSim user group, and other students in the course will all be critical resources for completing your project successfully. II. Goals The course project has two goals: 1) For both kicking motions, you will perform a range of modeling and simulation tasks with the ultimate goal of estimating muscle forces in both legs required to produce each kicking motion. You will seek to identify which muscles are the most likely to generate the most force in the grounded and kicking leg for both kicking motions. You will also compare muscle force solutions from static optimization (i.e., no force-length-velocity properties) with those from dynamic optimization (i.e., computed muscle control with force-length-velocity properties) to explore how choice of optimization and muscle modeling method affect your muscle force estimates. 2) EXTRA CREDIT: Determine which of two different kicking motions will cause a soccer ball to travel the farthest in the air. The first kicking motion involves hip and knee motion with no
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2 pelvis axial rotation (i.e., the “drive kick”), while the second kicking motion involves hip and knee motion with pelvis axial rotation (i.e., the “power kick”). Experimental data available for the project include static, drive kick, and power kick trials, where three trials were collected for each kicking motion. Marker data are stored in the .trc files, ground reaction data are stored in the .forces files, and muscle EMG data are stored in the .anc files. The experimental data collection protocol, including all marker names, is provided in Appendix A at the end of this document. To save you time and effort, you can pick one representative drive kick trial and one representative power kick trial for analysis. III. Requirements
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This note was uploaded on 02/15/2012 for the course EML 5595 taught by Professor Staff during the Spring '08 term at University of Florida.

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CourseProject - Course Project Professor B.J Fregly...

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