Figure 9
From: Brace technology thematic series: the progressive action short brace (PASB)
Dynamics constrained by the brace geometry. The trasverse section of the brace (A), elliptical and asymmetrical up to the plan of the pelvic hold, produces twisting moments opposed to the direction of rotation of the vertebrae included in the curve (b). The bending X-ray (c) shows the efficacy of the twisting action produced by the brace in all movements of the trunk.