Decomposition of muscle forces

[Aseel Ghazwan]

Hi,
How can I decompose the muscle forces into orthogonal components?
I need the component along the long axis of the femur which is contributing to the compressive KCF

I would greatly appreciated your help.

Thanks,
Aseel

[Dimitar Stanev]

Hi,

I am not sure if you can do this without some coding. What you can do is to extract the muscle line of action, which is not straightforward, because the muscle path is complex. If you have the muscle line of action, you can then project this force on the long axis, which you can compute easily if you define two points on the body and evaluate their position.

About the muscle line of action you can check the following project:

https://simtk.org/projects/force_direction

Good luck!

[Aseel Ghazwan]

Thanks Jim...I'll give it a try and let you know what happens!