Figure 4

Transfer function of a 6-s time window of PatID 15. Analysis of one 6-s time window of PatID 15 showing (a) signal 1 (Codman) and 2 (dash-dot line, Spiegelberg), (b) transfer function of magnitude, and (c) transfer function of phase with dash-dot line indicating estimate based on a delay of 0.12 sec. In this case, 80.4% of 6-s time windows showed a difference in MWA > 1 mmHg (largest MWA in Signal 1 in 51.6% and largest MWA in Signal 2 in 28.8%). In 7.6% of 6-s time windows, the difference in MWRT was > 0.1 sec (largest MWRT in Signal 1 in 3.2% and largest MWRT in Signal 2 in 4.4%).