Fig. 2From: Mild (not severe) disc degeneration is implicated in the progression of bilateral L5 spondylolysis to spondylolisthesisL5-S1 range of motion (RoM) in flexion (Fx) and extension (Ex) bending at peak load of 10 Nm. Compared with the INTACT model, the greatest increase in Fx and Ex RoMs was observed in the mildly-degenerate lytic defect model (M-DEG-LYTIC)Back to article page