Hello,
I was working to replace the upper body of the Delp full body model with the lumbar models. While attempting to do this I noticed the relative location of the sacrum in the spine model does not agree with the relative location of the Delp or any other models that include a sacrum. More specifically, the sacrum in the lumbar models seems to be more recessed into the pelvis than the Delp model. Consequently, this is causing some issues with the muscle attachment points at the sacrum. So I was wondering how the location of the sacrum was determined? Is there a reference for this?
Thanks you!