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Full Abstract: OpenSimTutorial gcmas2015.pdf
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Learning Objectives
OpenSim is open-source software that allows users to analyze and visualize models of the musculoskeletal system and to generate dynamic simulations of walking and other movements (see Delp 2007). OpenSim is highly relevant to the GCMAS Community because it enables users to study the effects of musculoskeletal geometry, joint kinematics, and muscle-tendon properties on the forces and joint moments that muscles can produce.
By this end of this tutorial, participants will be able to:
- Identify components of an OpenSim model (GUI & XML)
- Load a model and animate it
- Use OpenSim's Plot Tool to plot muscle moment arms and other data
- Use OpenSim's Scale and Inverse Kinematics Tools to scale a model and solve for the model's joint angles from marker data
- Analyze a model to explain how force-generating capacity changes after a simulated surgery
- List the steps needed to process experimental data for input into OpenSim
- Locate OpenSim documentation, examples, and resources
Preparing for the Tutorial
Enrolled participants Participants should bring (or be prepared to share with a colleague) a laptop running the Windows operating system with OpenSim and Notepad++ installed. Bring a computer mouse, too.
Before the tutorial:
(1) Please test your
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installations by completing the
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quick exercises posted below.
(2) Download the GCMAS tutorial files(coming soon).
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Download OpenSim
OpenSim is hosted on SimTK, a cloud storage service for biomedical tools and research. There are 32- and 64- bit versions available to correspond with your system requirements. If you are unsure which version you need, click here.
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Download OpenSim 3.2. |
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Download Notepad++
OpenSim model files and setup files are written in xml. Notepad++ is a free xml text editor that makes it easier to view and edit xml files. During the tutorial we will use Notepad++ to examine OpenSim files.
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Download Notepad++ |
How to Test Your Installation of OpenSim
coming soon
How to Download the GCMAS Tutorial Files (add zip tutorial folder)
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Download the Pre-Tutorial Test Exercises
Please download and complete the following exercises PRIOR to the tutorial. We've compiled these exercises to:
- Confirm that you've installed OpenSim correctly
- Introduce you to some useful features of OpenSim's GUI
- Help you configure Notepad++ to recognize OSIMM files as XML files
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Download Pre-Tutoral Test Exercises |
Download the GCMAS Tutorial Files
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Download Tutorial Files. |
Download Guided Tutorial Exercise (pdf)
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Download Guided Tutorial |
Download Tutorial Slides (pdf)
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Download tutorial slides |
Workshop Staff and Contact Information
Instructors
Allison Arnold-Rife (aarnold@oeb.harvard.edu) Concord Field Station, Harvard University
| Apoorva Rajagopal (apoorvar@stanford.edu) Neuromuscular Biomechanics Laboratory, Stanford University
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Support Staff
Chris Carty (c.carty@griffith.edu.au) School of Allied Health Sciences, Griffith University
| Ability & Innovation Lab, University of Washington  |
James Dunne (james.dunne@stanford.edu) Neuromuscular Biomechanics Laboratory, Stanford University
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Tutorial Exercises and Demos
coming soon
Tutorial Slides
coming soon
Background Reading
We recommend reviewing the following resources to lean more about OpenSim
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Useful Links and Literature
National Center for Simulation Research (NCSRR)
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OpenSim: Open-Source Software to Create and Analyze Dynamic Simulations of Movement
Scott L. Delp, Frank C. Anderson, Allison S. Arnold, Peter Loan, Ayman Habib, Chand T. John, Eran Guendelman, and Darryl G. Thelen
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 54, NO. 11, NOVEMBER 2007
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Muscle contributions to vertical and fore-aft accelerations are altered in subjects with crouch gait
KM Steele, A Seth, JL Hicks, MH Schwartz, SL Delp
Gait & posture 38 (1), 86-91
Can biomechanical variables predict improvement in crouch gait?
JL Hicks, SL Delp, MH Schwartz
Gait & posture 34 (2), 197-201
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