Fig. 4From: The increased motion of lumbar induces ligamentum flavum hypertrophy in a rat modelThis rat model might be histologically identical to mildly LFH of human. a-d image showed the MRI and MT staining of human samples from four groups: a non-hypertrophy, b mild LFH, c medium LFH, and d severe LFH. The yellow lines indicated thickness of the LF. The (e) Bar graph showed the ratio of elastic fibers to collagen fibers in the four human groupsBack to article page