FIGURE 2.

Highest Racine stage of seizures observed after experimental asphyxia. (A) Freely moving, non‐instrumented rats were exposed to steady or intermittent asphyxia followed by rapid (RRN) or graded restoration of normocapnia (GRN). No seizures were seen after steady asphyxia, whereas they were triggered in seven of 15 animals after intermittent asphyxia with RRN. GRN significantly decreased the proportion of animals with RS III–IV seizures and abolished RS V seizures. Sample sizes are given on top of the columns. (B) Similar to A, but the animals had been implanted with epidural cortical electrodes 24 h earlier (see Figure 3 for electrocorticography). GRN abolished RS V seizures also in these experiments