Fig. 20

This figure shows the clinical picture and schema of blocks for the functional type defined by a single structural lumbar or thoracolumbar curve. This is called E type in Rigo classification. The trunk is also here divided into three blocks, but the term “3C” here is not a proper one according to the adopted terminology. In fact, looking at the lumbo-pelvic region, E type correlate better with “4C.” Pelvis and lumbar or thoracolumbar region are uncoupled, like in “B type.” Proximal to the lumbar or thoracolumbar curve, there is a unique block more or less symmetric. Trunk imbalance is to the side of the lumbar or thoracolumbar convexity and pelvis is prominent on the concave lumbar or thoracolumbar side. The two lower blocks are translated and rotated one against the other, collapsing in both concavities