Fig. 2.

Independent influence of circadian cycle and behavioral cycle on metabolic, autonomic, and endocrine function. Left panels: influence of behavioral cycle, independent from circadian cycle. Right panels: influence of endogenous circadian cycle, independent from behavioral cycle. Error bars, SEM; gray areas, scheduled sleep episodes; short vertical gray bars, meal times as in Fig. 1; vertical dotted line, fitted core body temperature minimum; P-values, statistical significance for effect of behavioral cycle (Left panels) and circadian cycles (Right panels). Glucose and epinephrine scales are on the left and insulin and norepinephrine scales are on the right for both Left and Right panels.