The recovery of the electrocorticogram of normothermic canine brains after complete cerebral ischemia

Complete cerebral ischaemias of 1 to 30 min duration were performed under normothermic conditions in completely isolated canine heads perfused from a donor dog. The electrocorticogram was found to return in the reperfusion period following these complete ischaemias. The latency of recovery, i. e. the interval between the end of the complete cerebral ischaemia and the reappearance of the first cortical potentials, increased with increasing duration of the complete cerebral ischaemia; thus, the latency of recovery after a complete ischaemia of 30 min amounted to 11 to 12 hours.