Adding a new force to a model

[Gregory Philips]

Does anybody have an example of how to add an external force to a model?

I am using the upper extremity model and I would like to add an external torque to both the elbow and shoulder joint. The torque values are saved in a .mot file.

How do I specify the direction of the torque and the joint it acts on in the .osim file (I know it should be in the Force set parameter but I dont know what properties need to be specified under that, and how to ensure that the external values are taken during the inverse dynamics and static optimization steps)?

[Gregory Philips]

Is there an example of an external force (I think its called a torque actuator) that can be created to act at a joint? I wasnt able to find an example of it.