Learn about the biologically accurate and computationally efficient muscle model that has been incorporated into OpenSim, a biomechanics software package that simulates musculoskeletal muscle to gain insight into human and animal locomotion. Read more about this work at: Millard M, Uchida T, Seth A, Delp SL, "Flexing Computational Muscle: Modeling and Simulation of Musculotendon Dynamics", Journal of Biomedical Engineering 135(2):021005 (2013).