The lumbar section consists of pressure zones 2 and 1´ , which are applied one vertebra above and one vertebra below the apex of the lumbar curve.  These dorsally located pressures are a continuation from the ventral pressure zone 4.  Pressure zone 1´ extends almost to the posterior midline when lumbar hypolordosis is present and thus, it is needed to influence normal lumbar lordosis.  In the case that it is not required to increase the lordosis, pressure zone 1´ is not utilised, and the pressure zone 2 extends less to the midline.  The shape of these pressures are smooth and sufficiently deep enough to apply a corrective force to the lumbar curve.

The function of pressure zone 2 is for the lumbar curve correction in the coronal plane.  The 3-point pressure system is made up of pressure zone  2 and the counterforces from pressure zones 1 and 41.  Pressure zone 2 is applied above and below the apex of the curve, pressure zone 1 is a counterforce which is applied  to the opposite side of the lumbar curve and is located cephalically to the apex.  Pressure zone 41 is also applied to the opposite side of the lumbar curve and is located caudally to the apex, which is below the iliac crest, as shown in figure 3.21.

Figure 3.21 The lumbar curve is corrected by the 3-point pressure system, which consists of pressure zones 2, 1 and 41.  These forces are represented in the figure as 2, 1, and 41 respectively, (Master by thesis, Wood, G 2003). 

Dr Rigo's patient and brace with correctional Xrays:

                                                                           Patient and Brace (above)

                                                       X-Rays Out of (left) and In (right) Dr. Rigo's Brace