Brain cortex temperature minus core temperature (A) and brain cortex temperature minus core temperature as an average of 24 h measurements (B). Values are expressed as means ±s.e.m.; n = 5 for each group. B is the mean basal temperature obtained during 1 h before starting the hypoxaemia. A, normoxaemia (▪) versus hypoxaemia (□), *P < 0.05, two-way ANOVA for repeated measures and Newman-Keuls test. B, normoxaemia (filled bars) versus hypoxaemia (open bars), *P < 0.001, unpaired Student's t test.