FIGURE 3. Representative sections of lumbar spinal cords stained with hematoxylin and eosin (original magnification, ×100). A, sham-operated group. B, Group I (control). C, Group II (4 cycles of postconditioning). D, Group III (6 cycles of postconditioning). E, Group IV (6 cycles of postconditioning with a 5-minute delay). F, Group V (6 cycles of postconditioning with a 10-minute delay). Severe histologic damage was found in groups I and V, whereas viable large motor neurons were preserved to a much greater extent in groups II, III, and IV.