Inverse Kinematics with Strength Asymmetries

New project for OpenCap, which is a new software package to estimate 3D human movement dynamics from smartphone videos. OpenCap strongly relies on OpenSim.
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Edward Washabaugh
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Inverse Kinematics with Strength Asymmetries

Post by Edward Washabaugh » Fri Mar 08, 2024 4:41 pm

Hello,

The published paper showing the capabilities of OpenCap (https://pubmed.ncbi.nlm.nih.gov/37856442/) showed that the system could measure kinetic asymmetries in squatting. However, the data collected in this study were all performed on healthy individuals. How the system would perform if the subject had actual strength deficits on one side, such as in hemiparesis? Would we need to do additional scaling of optimal muscle forces to get accurate kinetics?

Thank you!

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Antoine Falisse
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Re: Inverse Kinematics with Strength Asymmetries

Post by Antoine Falisse » Mon Mar 11, 2024 10:19 am

Hello,

That's a good question. I'm guessing if the strength deficits result in kinematic asymmetries, then this might be reflected in the kinetics. However, it would indeed be beneficial to incorporate some knowledge about the patient into the model. For instance, researchers have used data from dynamometry to get a sense of force capabilities and scale muscle force properties accordingly.

Best,
Antoine

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