Hi,
I am looking into a movement of wrist; especially flexion and extension at wrist joint.
When loading “Mannequin.any” and I set WristFlexion with a positive value, the motion in the model view looks like this:
However, I found that the ISB standard suggests that flexion is a rotation with a positive angle around the axis of rotation with direction of thumb at wrist joint.
Ge Wu et al., “ISB recommendation on definitions of joint coordinate systems of various joints for the reporting of human joint motion—Part II: shoulder, elbow, wrist and hand,” Journal of Biomechanics 38 (2005)
That means, the picture above is in state of extension.
Does Anybody model use a different definition with the ISB recommendation? Or is there any other principle for wrist rotation description?