This study assessed the accuracy of surface-measured OpenSim-derived tibiofemoral kinematics in functional activities. Ten subjects with unilateral, isolated grade II PCL deficiency performed level running and stair ascent. A dynamic stereo radiography (DSX) system and a Vicon motion capture system simultaneously measured their knee or lower extremity movement. Surface marker motion data from t...

Personalized neuromusculoskeletal (NMS) models can represent the neurological, physiological, and anatomical characteristics of an individual and can be used to estimate the forces generated inside the human body. Currently, publicly available software to calculate muscle forces are restricted to static and dynamic optimisation methods, or limited to isometric tasks only. We have created and ma...

Virtual worlds provide a rich platform for supporting exploratory education. Their ability to bring together multimedia, programmability, interactivity and enhanced presence in a distributed 3D virtual environment makes them an excellent basis for interactive learning. This paper outlines work done in the virtual world OpenSim to create a learning environment for teaching the core algorithms wh...

Namba walking style, known as a movement that reduces rotational around the pelvic cross-section, was used in ancient Japan. This study of five participants conducted to investigate differences between normal and use musculoskeletal model analyze walking. Moreover, three-dimensional motion analysis system force plates were assess Measured data analyzed using software (OpenSim) procedures: scali...

Abstract Aim Ethical approval is difficult to acquire for functional electrical stimulation trials, simulation may bridge the gap between FES concept and clinical trial approval. Using OpenSim modelling tool, this project aims identify minimum number of muscles, their strength order stimulation, that can produce safest standing motion, using commercially available peripheral nerve stimulators. ...

The lower limb sidestepping kinematics of 20 elite female athletes were calculated using: 1) an established direct kinematic (DK) model (criterion) and, 2) two inverse kinematic (IK) models; one with and one without participant-specific joint co-ordinates prescribed during model preparation. The aim of this research was to determine whether prescribing joint co-ordinates influences the accuracy...

We have developed a new prototype of an interactive 3D avatar interface platform on the OpenSim server. It is redesigned and implemented using IronPython programming language. Our previous prototype was written in C# language, and it was modest to update scripts for avatar interaction. IronPython is an opensource implementation of Python language on the Microsoft .Net framework. We can make use...

Knowing the force profiles of individual muscles during various functional tasks may help to better identify various neuro-musculoskeletal impairments from functional movement analysis. Different simulation environments exist for this purpose. The aim of this study was to compare gait muscle force estimations (static optimisation) between the simulation environments AnyBody and OpenSim, using t...