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. 2022 Aug 17;11:e78811. doi: 10.7554/eLife.78811

Figure 8. 1/f exponent of EEG recordings increases with age in newborn babies.

(A) Schematic representation of EEG recording from frontal derivations of 36-45 post-conception week (PCW) newborn babies (left) displayed together with representative EEG traces from 36 and 45 PCW newborn babies (right). (B) Log-log plot displaying the normalized mean power spectral density (PSD) power in the 1–20 Hz frequency range of 36-45 PCW newborn babies (n=1110 babies). Color codes for age. (C) Violin plots displaying the 1/f exponent of 36-45 PCW newborn babies (n=1110 babies). (D) Same as (C) for 40 and 43 PCW newborn babies (n=72 EEG recordings and 40 babies). (E) 1/f exponent over age for the two EEG datasets (n=1110 babies and n=72 EEG recordings and 40 babies, respectively). In (D) black dots indicate individual data points. In (C) and (D) data are presented as median, 25th, 75th percentile, and interquartile range. In (C) and (D) the shaded area represents the probability distribution density of the variable. In (B) and (E) data are presented as mean ± SEM. Asterisks in (C) and (D) indicate significant effect of age. ***p<0.001. Linear model (C) and linear mixed-effect models (D–E). For detailed statistical results, see Supplementary file 1.

Figure 8.

Figure 8—figure supplement 1. EEG power spectral densities (PSDs) of newborn babies.

Figure 8—figure supplement 1.

(A) Log-log plot displaying the mean PSD power in the 1–20 Hz frequency range of 36-45 post-conception week (PCW) newborn babies (n=1110 babies). Color codes for age. (B) Same as (A) for 40 and 43 PCW newborn babies (n=72 EEG recordings and 40 babies). Color codes for age. (C) Same as (B) for normalized mean PSD power. In (A–C) data are presented as mean ± SEM.