Figure 3: Typical amperograms showing changes in NO and ONOO - concentration with time after stimulation with calcium ionophore (1 μM) in nonischemic (A) and ischemic (B) brain slides. Brain slides were obtained after 12 h of pMCAO from SD rats pre-treated with vehicle (PBS) or statins (20 mg·kg-1 simvastatin or 10 mg·kg-1 atorvastatin daily for 14 days).