Objective To investigate the changes of Bcl-2, Bax and caspase-3 expression in cerebral cortical neurons after cerebral ischemia-reperfusion(CIR). Methods 56 rats were randomly divided into sham operation group(control group) and ischemia-reperfusion group(observation group); the changes of Bcl-2 and Bax expressions were determined by immunohistochemistry. Results With the extension of CIR time, compared with control group, the apoptotic cells increased, and Bcl-2, Bax expressions increased in ischemic grou...