Figure 5From: Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleepNight sleep oscillations of PP and BAL in subject b06. In subject b06 the correlation between PP (gray line) and BAL (black line) is weaker but, most interestingly, PP still oscillates while BAL does not. Is PP a better marker for sleep stage related alterations of cardiac control?Back to article page