Muscle Force

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
POST REPLY
User avatar
hongjie hou
Posts: 19
Joined: Sun Sep 09, 2018 9:01 am

Muscle Force

Post by hongjie hou » Tue May 14, 2019 4:21 am

Hello everyone,
I want to know the detailed calculation process of muscle force. I do not know how to determine the force-length relation and force-velocity relation of muscle. is there any method to determine the data?
thanks,
hongjie

Tags:

User avatar
Thomas Uchida
Posts: 1183
Joined: Wed May 16, 2012 11:40 am

Re: Muscle Force

Post by Thomas Uchida » Tue May 14, 2019 8:28 am

You can find information and citations in the "Muscle Model Theory and Publications" section of the Confluence documentation (https://simtk-confluence.stanford.edu:8 ... blications). See, for example:
- Zajac, F.E. (1989) Muscle and tendon: properties, models, scaling, and application to biomechanics and motor control. Critical Reviews in Biomedical Engineering, 17(4):359-411. http://europepmc.org/abstract/MED/2676342
- Millard et al. (2013) Flexing computational muscle: modeling and simulation of musculotendon dynamics. ASME Journal of Biomechanical Engineering, 135(2):021005. https://doi.org/10.1115/1.4023390
I do not know how to determine the force-length relation and force-velocity relation of muscle. is there any method to determine the data?
Please see the papers referenced in Millard et al. (2013) and listed at the bottom of this page: https://simtk-confluence.stanford.edu:8 ... don+Curves.

User avatar
hongjie hou
Posts: 19
Joined: Sun Sep 09, 2018 9:01 am

Re: Muscle Force

Post by hongjie hou » Thu May 16, 2019 1:29 am

Hi Thomas

Thanks for the reply.I hava found active force-length relationship and passive force-length relationship.But I don't seem to find force-velocity relationship. And What is the relationship between 'Af' and 'force-velocity curve'?Where can I find the relationship between for force-velocity curve.It seems that the formula for f-v is not given in the literature.

Hongjie
Attachments
360截图20190516192906257.jpg
360截图20190516192906257.jpg (11.28 KiB) Viewed 162 times
360截图20190516185610032.jpg
360截图20190516185610032.jpg (59.97 KiB) Viewed 169 times
360截图20190515162653099.jpg
360截图20190515162653099.jpg (19.32 KiB) Viewed 183 times

User avatar
Thomas Uchida
Posts: 1183
Joined: Wed May 16, 2012 11:40 am

Re: Muscle Force

Post by Thomas Uchida » Thu May 16, 2019 8:18 am

Based on your third attachment, I assume you are using the Thelen2003Muscle model. Please see the following references:
- "Thelen 2003 Muscle Model" page in the Confluence documentation: https://simtk-confluence.stanford.edu:8 ... scle+Model
- API documentation for the Thelen2003Muscle class: https://simtk.org/api_docs/opensim/api_ ... ml#details
- The Appendix of Thelen, DG (2003) "Adjustment of muscle mechanics model parameters to simulate dynamic contractions in older adults", https://doi.org/10.1115/1.1531112

POST REPLY