FIGURE 3.
Effect of medium intensity vestibular stimulation on sleep and the sleep EEG (n = 22). (A) Effect of rocking on transition from wake to NREM sleep stages N1, N2, and N3. (B) Buildup of delta power (0.75–4.5 Hz) from 3 min before to 15 min after sleep onset. (C) Time spent awake after sleep onset (WASO), and in stage N1, N2, and N3 expressed as percentage of the total sleep period (TSP). (D) Power density spectra of channel C4-A1 during stage N3. Boxplots with mean values (x) and outliers (o) are illustrated. Lines represent mean power, shading SEM, and stars the significance increase of the slope of delta power (μV2/s) during the first 15 min after sleep onset (B, ∗∗∗p < 0.001).