Fig. 3From: The effect of repetitive flexion and extension fatigue loading on the young porcine lumbar spine, a feasibility study of MRI and histological analysesUn-loaded control (a) and FSU after repetitive flexion (b). Decreased signal in both the superior (1) and inferior growth zones (2) and endplates in the flexed FSU. Un-loaded control (c) and FSU after repetitive extension (d). Reduced signal in the superior growth zone (1) and in inferior end plate (2) in the extended FSUBack to article page