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Varying muscle activation and forces.
Posted: Sat Jul 29, 2017 6:04 am
by ync8yy
Hello, I ran a static optimization on a upper arm extremity model after applying a constant force. When I saw the results, I couldn't understand it. I was under the impression that a constant force would result in a constant activation for a specific muscle but the results showed that muscle activation for a muscle was varying while others were constant. Can someone explain why this is happening or if I'm just doing the simulation wrong.
Re: Varying muscle activation and forces.
Posted: Sat Jul 29, 2017 9:16 pm
by tkuchida
Is the model moving or are all joints locked?
Re: Varying muscle activation and forces.
Posted: Mon Jul 31, 2017 5:48 am
by ync8yy
Everything is locked
Re: Varying muscle activation and forces.
Posted: Mon Jul 31, 2017 10:02 am
by tkuchida
If the model is not moving in the motion you're tracking and the external force is constant over time, then each time frame should look the same and Static should return activations that do not change with time. Do you get constant activations when the external force is absent?
Re: Varying muscle activation and forces.
Posted: Mon Jul 31, 2017 1:39 pm
by ync8yy
Thank you for replying, it's fixed now.