Schematic summary of the WOMED concept of lateral tension. The four panels describe the graded development of lateral tension. Panel A shows the symmetrical body position. Panel B includes only Y+ tilting of the head. Panel C includes Y+ tilting, alteration of the orbits and slight eccentric position of the leg and foot. Panel D shows the complex pattern with head, orbit, face and lower limb asymmetry. We propose that in this stage eccentric muscle action will induce low grade inflammation.