TUNEL staining of basilar artery and basal cortex after SAH. Few apoptosis cells were observed in sham operated control rats (A and F). Increased TUNEL positive staining was observed in SAH+DMSO (B and G) and SAH rats (D and I), which was reduced markedly by atorvastatin. (C and H). Scale bar represents 200 μm. Quantitive analysis showed an obvious reduction in number of apoptosis cells (number/mm2) by atorvastatin compared with that in the DMSO group. (E and J, P < 0.01 vs DMSO group).