Hutchinson Trex SIMM (1.31 MB)

Tyrannosaurus SIMM musculoskeletal model

Download (1.31 MB)
posted on 08.05.2017, 09:57 by John HutchinsonJohn Hutchinson, Scott Delp, F. Clay Anderson, Silvia S. Blemker
This folder consists of the SIMM model files for the MOR555 T. rex specimen (now at Smithsonian) used in the following paper:
Hutchinson, J.R., Anderson, F.C., Blemker, S., Delp, S.L. 2005. Analysis of hindlimb muscle moment arms in Tyrannosaurus rex using a three-dimensional musculoskeletal computer model. Paleobiology 31:676-701. doi: 10.1666/04044.1

It includes these files:
1) A "bones" folder with .ASC format polygonal meshes at low resolution, as described in the above paper. Additional left leg files were generated as well as the third toe.
2) .jnt and .msl files ("trex J42" and "trex M42") that are used by proprietary SIMM software (version 7.0) to run the model; these can be opened as text files in typical text applications.
3) A snapshot of the SIMM model.

Note that the SIMM model has undergone minor changes from the 2005 paper's model, but these are fairly trivial (except as noted above).

SIMM software is commercial and available at:
The model can, in theory, be imported into the free, open source musculoskeletal modelling package OpenSim, but there may be file conversion issues. See for more information.


National Science Foundation postdoctoral fellowship in Bioinformatics to JRH in 2001


Usage metrics