Figure 5
Postural translations. Using a right-handed Cartesian coordinate system with X-axis positive to the left, Y-axis positive vertically, and Z-axis positive to the anterior, postures of the head, rib cage, and pelvis can be described as translations (Tx, Ty, Tz) along these axes. Vertical translations (Ty), which would require radiographic analysis of hypo- or hyper-lordosis, were not calculated in the present study.