reperfusion (IR) injury to rat brain tissue, but also with toxic effects. We sought to compare
the magnitude of protection offered by prolonged and intermittent oxygen pretreatments
against IR injury to the rat brain. Rats were divided into four experimental groups, each of 21
animals. The first two were exposed to 95% inspired (normobaric hyperoxia, NBHO) for 4
h/day for 6 consecutive days (intermittent NBHO) or for 24 continuous hours (prolonged …