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. 2018 Dec 17;9:1818. doi: 10.3389/fphys.2018.01818

FIGURE 4.

FIGURE 4

Distribution of the time intervals (inter-event intervals, IEI) between consecutive tibialis anterior (TA) electromyographic (EMG) events, expressed as number of IEI per hour of time spent in non-rapid-eye-movement sleep (N), in mice fed control diet (Ctrl, A,B) or iron-deficient diet (ID, C,D) during normoxia (black) and hypoxia (red). Data are shown separately for the light period (A,C) and dark period (gray shading, B,D) as means ± SEM with n = 8 per group. ANOVA did not indicate any significant effects of the light/dark period, hypoxia/normoxia, and Ctrl/ID group (cf. text for details).