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Table 3 Time features from raw (denoted by the subscript r) and envelope (denoted by the subscript e) CBFV signals (* denotes multiplication by 10−3)

From: Cognitive tasks and cerebral blood flow through anterior cerebral arteries: a study via functional transcranial Doppler ultrasound recordings

  Standard deviation Skewness Kurtosis Cross-correlation
  R-ACA L-ACA R-ACA L-ACA R-ACA L-ACA  
Rr 0.12 ± 0.05 0.12 ± 0.05 (-2.62 ± 0.15)* (-0.59 ± 4.77)* 4.10 ± 2.06 4.43 ± 3.58 (5.67 ± 9.13)*
Wr 0.12 ± 0.05 0.12 ± 0.05 (-0.55 ± 9.02)* 0.89 ± 10.2)* 3.57 ± 0.90 4.26 ± 2.60 (6.96 ± 9.11)*
Gr 0.12 ± 0.04 0.12 ± 0.05 (-1.11 ± 9.38)* (-1.26 ± 4.69)* 3.74 ± 0.95 4.42 ± 2.87 (6.50 ± 8.59)*
Re 15.9 ± 4.76 15.1 ± 5.98 1.17 ± 0.93 1.07 ± 0.58 5.95 ± 6.51 5.17 ± 2.52 0.89 ± 0.06
We 16.0 ± 4.72 15.2 ± 5.93 1.20 ± 0.90 1.13 ± 0.67 5.94 ± 6.16 5.50 ± 3.22 0.89 ± 0.06
Ge 15.9 ± 4.95 14.5 ± 5.87 1.03 ± 0.46 1.11 ± 0.63 4.74 ± 1.80 5.41 ± 2.79 0.90 ± 0.05