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Time course of maximum (closed circles) and minimum (open circles) values of oxygen partial pressure (PtO2) in cerebral cortex and arterial oxygen saturation (SaO2) recorded in both age groups during the application of obstructive apneas. Baseline value is represented by a triangle. Results are shown as mean ± standard error. * P < 0.05 with respect to the baseline in maximum and respect to the first apneic event in minimum.
