The volume of spinal infarct 72 hours after reperfusion. A great infarction volume was seen in the ischemic group, but infarction volumes were largely decreased in the animals with BYHWD administration, and roscovitine pre-treatment. The infarction volume was lower in the group with BYHWD than that in the group with roscovitine; but there was no significant difference between the two groups. **: P < 0.01 vs. Control group. *#: P < 0.05 vs. SI + Saline. SI + Saline: Spinal ischemia + Saline. SI + BYHWD: Spinal ischemia + BYHWD. SI + R: Spinal ischemia + Roscovitine.