I DOWNLOADED OPENSIM - NOW WHAT?
This introductory tutorial at the 2015 Gait and Clinical Movement Analysis Society (GCMAS) annual meeting provides hands-on lessons for getting started with OpenSim.
The workshop will take place on Wednesday March 18, 4-6pm. The workshop will feature a practical, hands-on tutorial will introduce participants to OpenSim’s features, file formats, and documentation using clinically-relevant examples.
Full Abstract: OpenSimTutorial gcmas2015.pdf
Prepartion for the Tutorial
Enrolled participants should bring a Laptop running Windows operating system and OpenSim installed.
Downloading OpenSim
OpenSim is hosted on SimTK, a cloud storage service for biomedical tools and research.
Download OpenSim 3.2. There are 32- and 64- bit versions available and are designed to correspond with your system requirements. If you are unsure how to find this out; click here.
Papers to read
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
| James Dunne james.dunne@stanford.edu Neuromuscular Biomechanics Laboratory, Stanford University
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Tutorial Exercises and Demos
Purpose:
OpenSim (http://opensim.stanford.edu/) is a freely-available software package for visualizing musculoskeletal structures and generating computer simulations of walking and other movements. This practical, hands-on tutorial will introduce participants to OpenSim’s features, file formats, and
documentation using clinically-relevant examples.
Intended Audience: The tutorial is designed for GCMAS attendees (scientists, clinicians, and students) who are curious about the capabilities of OpenSim, but who have not previously used the software.
Prerequisite Knowledge:
Participants will be asked to bring (or share with a colleague) a laptop PC with a mouse and with OpenSim and Notepad++ installed. Instructions for installing and getting started with these programs (both freely available) will be emailed to participants prior to the tutorial. To complete the hands-on exercises, participants must be comfortable navigating to files and managing multiple windows on their laptops. Participants will work in small teams at their own pace (guided by instructors), so exercises will be accessible to participants with varying backgrounds.
Abstract:
Computer simulation has emerged as a powerful method to investigate the actions of muscles during movement, to identify factors that contribute to movement disorders, and to evaluate the consequences of possible treatments. OpenSim (http://opensim.stanford.edu/) is freely-available software for developing and analyzing such simulations. Given measured external reaction forces and motion capture data, OpenSim allows users to visualize models of the musculoskeletal system,
estimate internal forces, run analyses, and plot results. Since OpenSim was first released in 2007, the number of worldwide users has grown dramatically (> 60,000 unique downloads). What features of OpenSim explain its popularity? Would OpenSim be useful in my lab? What are some good ways to get started? This practical, hands-on tutorial will help answer such questions. Participants will be introduced to OpenSim’s features, file formats, and documentation using clinically-relevant examples.Proposal for Tutorial at GCMAS 2015
Learning Objectives:
1. Identify components of a musculoskeletal model in OpenSim and in the model’s XML file.
2. Load a model in OpenSim and animate it using measured joint angles and/or marker trajectories.
3. Use an OpenSim model to examine whether muscle force- or moment-generating capacity
changes substantially following a simulated surgery.
4. Describe the steps needed to process motion capture and GRF data for input into OpenSim.
5. List three limitations of existing OpenSim tools and three features to watch for in upcoming
releases.
6. Locate OpenSim online resources, documentation and examples for further exploration.
Content: Minutes
| Content | Minutes |
|---|---|
− What is OpenSim and what can the software do? | 10 |
Components of a Musculoskeletal Model (hands on) − How are models loaded, viewed, and edited in the OpenSim GUI? − How are bodies, joints, and muscles defined in an OpenSim XML file? | 10 |
Animating and Plotting (hands on) − How do I animate a model based on measured joint angles? − How do I take snapshots and save movies? − How do I plot useful data? | 10 |
Scaling and Inverse Kinematics − How do I scale and animate a model based on marker trajectories? | 15 |
| Guided Exploration (hands on): − In small teams, participants will use OpenSim to analyze the biomechanical consequences of a simulated tendon transfer surgery. Sample exercises, involving models of both the upper and lower extremity, will be provided. | 45 |
| Processing Experimental Data − What’s involved in converting my own experimental data into the file formats used by OpenSim? | 10 |
| Limitations, New Developments, and Next Steps | 10 |