How to calculate the moment of a single muscle to a joint

[zzs22500]

Hi
I want to study the moment of a single muscle to a joint. For example, the rectus femoris, how to calculate the moment of the rectus femoris to the knee joint during the gait. Can this be found in the Anybody chart, and if not, how do I calculate it? Any help would be greatly appreciated.

Best wishes
zzs

[toerholm (Søren Tørholm)]

Hi

It is a good question please see this wiki link for an answer https://github.com/AnyBody/support/wiki/All-about-Kinetics#measure-the-moment-created-by-the-muscles-around-a-joint-degree-of-freedom-in-a-certain-coordinate-system

Best regards
Søren

[zzs22500]

Hi Søren
I saw the link you shared with me. And according to the content of the link, I made some attempts in MocapExamples LowerExtremity.main. I want to measure the moment of the rectus femoris to the knee joint.But when I changed the knee joint to the hip joint, I did the inverse dynamic analysis and got the same moment value. Can you tell me where the problem is? Any help would be greatly appreciated. Thank you in advance.

Best regards
zzs

[toerholm (Søren Tørholm)]

Please see this post

Measuring the moment of a single muscle to the joint

Hi I want to calculate the moment of the rectus muscle to the knee joint. I wrote the code according to AnyForceMomentMeasure2 KneeNetMoment. Although the model works, the result is wrong. When I replace the rectus muscle with other muscles, the result is the same. Can anyone tell me how to modify it? This problem has been bothering me for a long time. I will be very grateful if anyone can help me. AnyForceMomentMeasure2 MomentMeasure2 = { AnyRefFrame &Ref =…Seg.Pelvis.HipJoint.RotNode; Inc…