Developmental Changes in Sleep Spindle Characteristics and Sigma Power across Early Childhood

Figure 2

Boxplots of sleep spindle duration (a), frequency (b), integrated spindle amplitude (ISA; (c)), and density (d) at ages 2, 3, and 5 years for each EEG derivation (C3A2, C4A1, O1A2, and O2A1). Upper and lower borders of boxplots represent upper and lower quartiles, tails represent minimum and maximum scores, the vertical midline represents the median, and outliers are indicated by +. Lines at the top of each plot denote significant post hoc paired -test comparisons (Bonferroni correction; ).

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