Resultant muscle forces and muscular activity

Main Forum
1

Hello all,

I am working on comparing the total muscular forces and the net muscular activity of different leg muscles when wearing and not wearing a lower extremity exoskeleton. From the Anybody, I can see that there are different components of each muscle. For instance, a soleus consists of 6 components: Soleus Medialis 1,2,3 and Soleus Lateralis 1,2,3. So, I was wondering what would be a good way to combine all the muscle force and activity from all the components of each muscle into one number for that muscle. Also, I have the following code that measures the muscular forces for each of the components of the soleus muscle. Is the following way of measuring the muscular forces correct ?

AnyForceMomentMeasure2 Soleus =
{
AnyRefFrame &ref1 = Main.Studies.HumanModel.BodyModel.Right.Leg.Seg.Shank;
AnySeg &seg1= Main.Studies.HumanModel.BodyModel.Right.Leg.Seg.Shank;
AnyForceBase &mus1 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusMedialis1;
AnyForceBase &mus2 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusMedialis2;
AnyForceBase &mus3 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusMedialis3;
AnyForceBase &mus4 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusLateralis1;
AnyForceBase &mus5 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusLateralis2;
AnyForceBase &mus6 = Main.Studies.HumanModel.BodyModel.Right.Leg.Mus.SoleusLateralis3;
};

Later on, I also intend to compare these results with the EMG data. So, considering this situation, what would be the correct approach to take with computing the resultant muscle forces and muscular activity.
Any assistance would be truly helpful.

Thanks,
Anup

2

Hi @ap21

Each of the muscle branches have a Fm variable that is the force in the contractile element - for the simple muscle model it is the force in the total muscle-tendon unit.
you can read more on the muscle variables here.

If it is forces you are interested in, then you can sum up the Fm for all branches.

The AnyForceMomentMeasure2 is used to find the total equivalent force at a certain point.
If you just need the total force produced by the muscle you dont need that.

Best regards,
Bjørn

3

This topic was automatically closed 125 days after the last reply. New replies are no longer allowed.