Fig. 5.

Increased low-frequency frontal power is seen with increasing age in girls with Rett syndrome. Spearman’s rho correlations between age and frontal low frequency power in girls with Rett syndrome and TD controls. Girls with Rett syndrome demonstrate opposite trajectories of baseline EEG frontal power with age in the delta (2–4 Hz) band (a) and theta (4–6 Hz) band (b) when compared to typically developing controls, with power increasing with age in girls with RTT and decreasing with age in controls. Linear regression was used to generate fit lines for each data set. TD typically developing; RTT Rett syndrome