Trend plots of mean ICP/mean ICP wave amplitude of Signals 1 and 2 (PatID 13). The trend plots of mean ICP and mean ICP wave amplitude (MWA) of (a) Signal 1 and (b) Signal 2 of PatID 13 is shown [Average of mean ICP: 9.8 mmHg (Signal 1), 5.0 mmHg (Signal 2). Average of mean ICP wave amplitude: 3.4 mmHg (Signal 1), 2.5 mmHg (Signal 2)]. The vertical arrow in (b) indicates a shift in mean ICP without accompanying change in MWA. The shift of mean ICP in (b) was not accompanied by a simultaneous shift of mean ICP in (a).