A shoulder model with an accurate scapulothoracic joint and includes scapular muscles to drive its motion. The model can be used to compute the work done by the thoracoscapular muscles during shrugging and any arm elevation task.
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Maud Hendriksen
- Posts: 20
- Joined: Thu May 14, 2020 12:00 am
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by Maud Hendriksen » Fri Jul 31, 2020 5:27 am
Dear OpenSim users,
I am trying to use the thoracoscapular model. However, when I scale the model in the GUI, the humerus and radius are not attached anymore in my scaled model. Does anybody know how to fix this? I have unlocked all coordinates of the original model.
- scaledModel.png (264.01 KiB) Viewed 516 times
Also, when I scale this model through Matlab I get the following error after initializing the system or using the scaling tool:
Body 'scapula' not connected by a Joint.
A FreeJoint will be added to connect it to ground.
Java exception occurred:
java.io.IOException: Attempting to assign an invalid SimTK::MobilizedBodyIndex
In Object 'cp_in_clavicle' of type PhysicalOffsetFrame.
Thrown at PhysicalFrame.cpp:73 in setMobilizedBodyIndex().
at org.opensim.modeling.opensimSimulationJNI.Model_initSystem(Native Method)
at org.opensim.modeling.Model.initSystem(Model.java:848)
Is there a way to fix this in the model?
It also says that the model is not recognized:Object::newInstanceOfType(): object type 'ScapulothoracicJoint' is not a registered Object!
Object type ScapulothoracicJoint not recognized
Thank you in advance for any advice.
Kind regards,
Maud
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Italo Belli
- Posts: 2
- Joined: Mon Oct 04, 2021 6:33 am
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by Italo Belli » Fri Feb 25, 2022 5:33 am
Dear Maud,
I know that your question is a bit old but maybe I can try to help you (or help others who are in your same situation).
I am also scaling the thoracoscapular shoulder model, both in the GUI and in Matlab, and I haven't run in your issue. Which setup file were you using for the scaling? Were you using the same markerset that comes by default on the model itself?
I really hope that you were able to solve this problem, and in case it would be great if you could post here what was going wrong!
Best regards,
Italo
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Jiale Zhu
- Posts: 3
- Joined: Sun Oct 30, 2022 9:29 am
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by Jiale Zhu » Mon Jul 17, 2023 3:07 pm
Dear Italo,
Sorry to bother you. I have some questions for the marker in this model which I want to consult with you.
How could you make sure the position of marker "gu", it seems like this marker is in the humerus bone.
And how do you attach marker "centelbow"? Did you attach EpL and EpM marker during experiment and calculate centelbow marker position later?
Best regards,
Jiale
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Italo Belli
- Posts: 2
- Joined: Mon Oct 04, 2021 6:33 am
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by Italo Belli » Tue Jul 18, 2023 12:10 am
Dear Jiale,
note that I was not involved in this study, I am just using the model and the data myself. So, I was not present during the experiments and digitalization of the markers. However, in general, you are right when you say that the position of certain markers has been calculated during the post-processing step, as they are physically impossible to place (like the "centelbow" one). There exist some regression techniques that, given the position of a few bony landmark, can estimate quite accurately the position of other point of interest (such as the center of a joint, or particular points on the scapula). For what concerns the "gu" marker, I am not sure how it was tracked/retrieved.
I hope this helps!
Best regards,
Italo