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. Author manuscript; available in PMC: 2014 Mar 25.
Published in final edited form as: J Biol Rhythms. 2012 Aug;27(4):287–298. doi: 10.1177/0748730412448618

Figure 2.

Figure 2

Effects of circadian arrhythmia on ultradian rhythms. Mean ± SEM (A) period (τ′), (B) robustness, (C) mesor, (D) absolute amplitude, and (E) relative amplitude (as % mesor) of ultradian waveforms in ENTR, FR, and ARR hamsters. For ENTR and ARR groups, bars indicate locomotor activity during the dark phase (Dark) and light phase (Light) of the 16L:8D photoperiod. For the FR groups, bars indicate locomotor activity occurring during the subjective night and subjective day of the free-running circadian activity waveform, and dashed lines indicate activity occurring during the objective night (dark phase) and objective day (light phase) of the 16L:8D photoperiod. Sample sizes are indicated along the abscissa in panel A.*p < 0.05 vs. light-phase (or subjective day) value, within circadian phenotype; **p < 0.001 vs. all other groups; #p < 0.05 vs. ENTR-light and ARR-light values.