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. 2013 Nov 5;13:34. doi: 10.1186/1471-2342-13-34

Figure 8.

Figure 8

Pelvic Incidence (PI), Facet Joint (FJ) Arthritis and Orientation at L5/S1: On the left side, low PI indicates a normal FJ and more coronal FJ orientation at the lower lumbar spine. Contrarily, the right side shows increased PI with associated FJ arthritis and more sagittal FJ orientation at the lower lumbar spine.