American Society of Anesthesiologists

Fig. 4. The distribution of the median baseline values of approximate entropy (ApEn; A ), 95% spectral edge frequency (SEF95; B ), and canonical univariate parameter (CUP; C ) derived from the raw electroencephalographic data in the frontoparietal montages (F3, F4, Cz, P3, and P4). Each empty circle represents the median baseline value of one volunteer. The mean values (± SD) of the median baseline approximate entropy in F3, F4, Cz, P3, and P4 montage were 0.679 ± 0.064, 0.681 ± 0.054, 0.686 ± 0.053, 0.689 ± 0.051, and 0.695 ± 0.0430, respectively. Values for SEF95were 19.46 ± 3.87, 19.48 ± 3.50, 19.80 ± 3.18, 20.25 ± 2.81, and 20.61 ± 2.41, and values for CUP were 1.675 ± 0.674, 1.610 ± 0.650, 1.552 ± 0.595, 1.469 ± 0.595, and 1.360 ± 0.575, respectively.

Fig. 4. The distribution of the median baseline values of approximate entropy (ApEn; A ), 95% spectral edge frequency (SEF⁹⁵; B ), and canonical univariate parameter (CUP; C ) derived from the raw electroencephalographic data in the frontoparietal montages (F3, F4, Cz, P3, and P4). Each empty circle represents the median baseline value of one volunteer. The mean values (± SD) of the median baseline approximate entropy in F3, F4, Cz, P3, and P4 montage were 0.679 ± 0.064, 0.681 ± 0.054, 0.686 ± 0.053, 0.689 ± 0.051, and 0.695 ± 0.0430, respectively. Values for SEF⁹⁵were 19.46 ± 3.87, 19.48 ± 3.50, 19.80 ± 3.18, 20.25 ± 2.81, and 20.61 ± 2.41, and values for CUP were 1.675 ± 0.674, 1.610 ± 0.650, 1.552 ± 0.595, 1.469 ± 0.595, and 1.360 ± 0.575, respectively.

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