Fig. 8

TUNEL-stained sections of the rat CEP. a Negative control (a) and positive control (b). b The forward flexed neck group. Before wearing brace (a), at 2 weeks post-experiment (b), at 4 weeks post-experiment (c), and at the final follow-up (6). c Bipedal group. Before the experiment (a), at 2-, 4-, and 6-week follow-up (b, c, d). d Normal group. Before the experiment (a), at 2-, 4-, and 6-week follow-up (b, c, d). Arrows indicate TUNEL-positive chondrocytes (brown). Scale bar = 50 μm