Estimation of optimal fiber length and tendon slack length in Hill-type muscle models included in musculoskeletal models can be challenging. This project presents an optimization based technique to adjust muscle parameters of models linearly scaled from a generic one and to obtain reasonable estimation of optimal fiber lengths and tendon slack lengths in models generated from medical images.

This project provides an OpenSim plugin and equivalent Matlab tools for estimating optimal fiber lengths and tendon slack lengths via an optimization procedure in subject specific models.

The Muscle Parameter Optimization Toolbox for OpenSim uses the open source Apache 2.0 license (see LICENSE.txt and NOTICE.txt), making it suitable for any use commercial, government, academic, or personal.

If you use the toolbox, you must acknowledge the Muscle Parameter Optimization Toolbox where appropriate, by citing the following paper:

Modenese L, Ceseracciu E, Reggiani M, Lloyd DG. Estimation of musculotendon parameters for scaled and subject specific musculoskeletal models using an optimization technique. Journal of Biomechanics (2015), doi:10.1016/j.jbiomech.2015.11.006