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Table 2 Spectral and transfer function analysis

From: Dynamic cerebral autoregulation after confinement in an isolated environment for 14 days

  Before After P value
VLFMAP (mmHg2) 6.41 ± 1.20 6.61 ± 1.23 0.91
VLFvel (cm2/s2) 4.30 ± 1.06 3.92 ± 0.96 0.58
CohVLF (unit) 0.52 ± 0.04 0.50 ± 0.04 0.56
GainVLF (cm/s/mmHg) 0.63 ± 0.10 0.53 ± 0.08 0.37
PhaseVLF (radians) 1.41 ± 0.10 1.41 ± 0.17 0.97
LFMAP (mmHg2) 2.50 ± 0.45 2.55 ± 0.49 0.93
LFvel (cm2/s2) 1.19 ± 0.22 1.43 ± 0.20 0.20
CohLF (unit) 0.51 ± 0.06 0.58 ± 0.06 0.18
GainLF (cm/s/mmHg) 0.54 ± 0.07 0.69 ± 0.09* 0.048
PhaseLF (radians) 0.63 ± 0.16 0.81 ± 0.13 0.50
HFMAP (mmHg2) 0.25 ± 0.06 0.18 ± 0.04 0.29
HFvel (cm2/s2) 0.25 ± 0.05 0.23 ± 0.06 0.82
CohHF (unit) 0.61 ± 0.05 0.63 ± 0.06 0.74
GainHF (cm/s/mmHg) 0.80 ± 0.05 0.92 ± 0.09* 0.046
PhaseHF (radians) − 0.01 ± 0.10 0.01 ± 0.04 0.79
  1. Values are means ± SEM. Before before the 14-day confinement period in an isolated environment, After after the 14-day confinement period in an isolated environment, VLFMAP very low-frequency component of mean arterial blood pressure (MAP) variability, VLFvel very low-frequency component of mean cerebral blood flow velocity (MCBFV) variability, CohVLF coherence in the very low-frequency range, GainVLF transfer function gain in the very low-frequency range, PhaseVLF phase in the very low-frequency range, LFMAP low-frequency component of MAP variability, LFvel low-frequency component of MCBFV variability, CohLF coherence in the low-frequency range, GainLF transfer function gain in the low-frequency range, PhaseLF phase in the low-frequency range, HFMAP high-frequency component of MAP variability, HFvel high-frequency component of MCBFV variability, CohHF coherence in the high-frequency range, GainHF transfer function gain in the high-frequency range, PhaseHF phase in the high-frequency range. *P<0.05 comparison between before and after the 14-day confinement period in an isolated environment