Fig. 2.
Desynchronization of sleep stages in the forced desynchronized rat. (A) Double plotted actograms of wakefulness, SWS, PS, locomotor activity, and CBT of a representative rat, and their corresponding periodograms. (B) Circadian variation of all variables in the same animal shown in A, plotted in modulo of the two significant periods (T22 h = 22 h; τ>24 h = 25 h, 5 min) obtained in the periodogram. Values represent the mean ± SE of the 10-min interval values for each successive cycle, smoothed by running averages of three data points. The dark and white horizontal bars on the left indicate the dark and light phases of the 22-h LD cycle, respectively.