Moving musculoskeletal

[Bhavna (Bhavna Singh)]

I an trying to move forearm by Elbow joint without moving the upper arm and shoulder joint in sagittal plane.

Can someone help me to find where i am making mistake and what should i do

[dschander (Divyaksh S. Chander)]

Hi Bhavna,

That should normally work. If you put some values in the mannequin.any file, the model should assume the posture and velocities you specify in Mannequin.any. However, I noticed in the second screenshot that you have commented out the shoulder GH joint driver. If you leave it there with velocity and position set to zero, it should do the trick.

I also noticed from your model tree that there is the DefaultMannequinDrivers folder under the Model. This means that you should be able to set the the mannequin posture and velocity in the Mannequin.any file without needing any extra drivers from your side.

Best regards,
Dave

[Bhavna (Bhavna Singh)]

Hello divyaksh,
It was very helpful it did move as desired after setting velocity and position to zero in JointsandDrivers file, but when I switched off muscles, Scapula and Clavicula are moving in upward direction. I have tried changing mannequin posture with different values but it didn't work, Setting Drivers velocity and position will make it indeterminant for analysis. it will be very kind if you look into this too.

Thanks & Regards
Bhavna

[dschander (Divyaksh S. Chander)]

Hi Bhavna,

That should not normally not happen with the scapula and clavicula moving. I see that you have set sterno-clavicular protraction and elevation to zero. Please set them to their default values (the ones that were there originally). Also, please check if you have set the velocity values for these angles to zero.

If this doesn't work, it's likely there is some other driver that you may have added that is acting on the scapula and clavicula.

Best regards,
Dave