Muscle activations

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Pia Stefanek
Posts: 48
Joined: Tue Mar 13, 2018 12:21 pm

Muscle activations

Post by Pia Stefanek » Tue Oct 23, 2018 9:20 am

Hi,

I have a Question concerning the muscle activations, controls and actuation force. I used the model Gait2354 and performed a gait Simulation. The I performed CMC and plotted actuations, controls and Forces. I got the results which are attached below. I wanted to compare the activations to the EMG results of a book but they do not match. Is this because of the implementation of the Thelen muscle?


Thank you in Advance.

Kind regards
Pia
Attachments
MuscleActivationsBook.JPG
MuscleActivationsBook.JPG (60.82 KiB) Viewed 243 times
Controls and activation.JPG
Controls and activation.JPG (48.91 KiB) Viewed 243 times
ActuationForce.JPG
ActuationForce.JPG (38.93 KiB) Viewed 243 times
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OpenSim 3.3 and Earlier
OpenSim 4.0
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Thomas Uchida
Posts: 1800
Joined: Wed May 16, 2012 11:40 am

Re: Muscle activations

Post by Thomas Uchida » Tue Oct 23, 2018 3:34 pm

There may be some helpful discussion in the following paper (see, e.g., Section 3.3, Section 3.5, and Figure 10): Hicks, J.L., Uchida, T.K., Seth, A., Rajagopal, A., Delp, S.L. Is my model good enough? Best practices for verification and validation of musculoskeletal models and simulations of movement. ASME Journal of Biomechanical Engineering 137(2):020905, 2015. http://nmbl.stanford.edu/publications/pdf/Hicks2015.pdf
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