Figure 4.

Expression of circadian markers throughout the sleep/wake cycle. Four-hr bins for Wake (W1-W4) or Sleep (S1-S2) represent the 24-hr day. For each clock gene evaluation, the fraction of individuals for whom a significant circadian amplitude of expression was detected is shown in the upper left corner of each cell. One subject did not participate in the final evaluation, thus results for this evaluation are given for n=4 subjects.