Differential pressure trend plots of mean ICP/MWA of signals 1 and 2. Differential pressure trend plots of (a) Patient 1, (b) Patient 2, and (c) Patient 6. The trend plots in blue reveal differences in mean ICP computed for consecutive 6-sec time windows (Mean ICPSignal 2 – Mean ICPSignal 1), while the green plots show differences in MWA (MWASignal 2 – MWASignal 1) of Signals 1 and 2, of the same 6-sec time windows. The presence of PBEs are indicated by major differences in mean ICP but with close to identical MWAs (differences in MWA <0.5 mmHg). (a) and (b) BPE type 2. (c) BPE type 1.