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. 2015 Apr 1;38(4):567–579. doi: 10.5665/sleep.4572

Figure 6.

Figure 6

Sleep waves and spindles architecture. Wave triggered average of slow waves (SW) and spindles during the light phase slow wave sleep (SWS). Representative raw electroencephalographic data with corresponding band-pass filtered traces and typical shape and amplitude (A) of SW (1–15 Hz) and spindles (10–15 Hz) is shown in panel A. (B,E) Wave-triggered average of down deflections showing a significant decrease in minima reached on D1 and D14 (P < 0.05, paired t test, inserts). (C,F) Histograms of SW amplitude in relative values for early (E, first third of light phase SWS) and late (L, third third) occurrence (P < 0.001, two-way analysis of variance [ANOVA]). (D,G) Increase in slope 1 (P < 0.005 on D1 and D14) and slope 2 (P < 0.05 on D1) for SW of equal amplitude (percentile 0.4 to 0.6). (H,I) Wave-triggered average where the maximum of spindle is centered on t = 0. Spindle envelope underlines the difference in amplitude for each peak (black squares, P < 0.05, paired t test, inserts). (J,K) Histograms showing increase in the amplitude of spindles on D1 and D14 (P < 0.001, two-way ANOVA for all) with maintenance of circadian effects when considering L versus E (P < 0.005, two-way ANOVA for all).