Knee joint adduction moment

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1

Hi
I want to study the gait of patients with knee osteoarthritis.The adduction moment is a good evaluation indicator.Can you tell me how to calculate the knee jonit adduction moment in Anybody? Any help would be great appreciate.

Best wishes
babaozhou

2

Look here for all the knee moments:

Main.HumanModel.BodyModel.Right.Leg.MomentMeasure.KneeNetMoment.M

Then select the component corresponding to the moment about the anterior-posterior axis. So if this is the x-axis then you would use:

(Main.HumanModel.BodyModel.Right.Leg.MomentMeasure.KneeNetMoment.M*ref.Axes)[0]

Best Regards,
Christine

3

Hi Christine
Thank you for your answer. In Main.HumanModel.BodyModel.Right.Leg.MomentMeasure.KneeNetMoment. Can you tell me what does F and M and ref mean? And what is the difference between KneeNetMoment and KneeFlexion in SelectedOutput? Any help would be great appreciate. Thank you in advance.

Best wishes
babaozhou

4

Hi babaozhou,

F-force
M-Moment
ref- reference frame

KneeNetMoment is a vector consisting of the three knee joint moments, while KneeFlexion is only the knee flexion moment.

Best Regards,
Christine

5

Hi Christine
Thank you for your reply. So KneeNetMoment will include the knee flexion moment? I compared it and found that there is no curve in KneeNetMoment that coincides with KneeFlexion. Thank you in advance.

Best wishes
babaozhou

6

Hi babaozhou,

That is because these two measures are in different reference frames. Remember the KneeFlexion is equal to this:

Best regards,
Christine

8

Hi babaozhou!

My name is Simon. Hope you are making much progress in your simulation with Knee Osteoarthritis.

I'm also studying about the biomechanics of knee OA. May I invite you to our research groups? We may have a lot common interests and make more progress in this exciting field!

My contact information is:

WECHAT: simonma190
email: simonma521@gmail.com

9

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