Knee flexion force

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John Rogers
Posts: 45
Joined: Fri Feb 24, 2012 11:47 am

Knee flexion force

Post by John Rogers » Mon Jun 17, 2013 10:27 am

Hello Ayman, Ajay and all,

I would like to do the following simulation of slow knee extension from 90 to 0 degrees.
This is a series of static calculations--I am not interested in acceleration.
Pose the human model as if sitting, femur horizontal, leg hanging down in static equilibrium, i.e. knee angle around 90 degrees, and tibia vertical.
find the following quantities as a function of knee extension angle:
knee joint moment,
sum of knee flexor muscle forces,
and the corresponding moment arms.

There is only one coordinate of interest.

Can you help me get started?
Thanks,
John

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Ximena Rosas
Posts: 2
Joined: Mon May 27, 2013 12:08 pm

Re: Knee flexion force

Post by Ximena Rosas » Tue Jun 25, 2013 6:34 pm

Currently, I am enrolled in a Masters Program on Biomedics Engineering at National University of Colombia.
For my research project, I would like to adapt a model to examine the generation of force in every portion of the quadriceps during a resisted knee extension by using a weight located in the ankle.
The subject would be sat down with hip flexed 90 degrees, knee flexed 90º. Knee will be extended until 0º while wearing the weight. This model does not imply weight bearing , therefore I will not have any data from a force plate.
Could you please advise me on the steps I should follow to make the model using Opensim?

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