Fig. 7.

Relationship between predicted and measured motions at the costovertebral joints in A. mississippiensis. Scatterplots with regression lines showing the relationship between the orientation of the vertebral rib axis of rotation as predicted from joint morphology and that observed in vivo using XROMM. Orientation of each axis is measured as an angle from the (A) YZ (sagittal), (B) XZ (coronal) and (C) XY (transverse) planes for costovertebral joints 1, 4 and 7. The dashed lines show lines of identity (predicted angle=measured angle).