Figure 3.

Average numbers of attempts to enter sleep during consecutive 10 min intervals across 2 h periods of total sleep deprivation for rats with different patterns of baseline sleep-waking diurnal organization. A, Sleep deprivation during the light period in the condition of a strong diurnal rhythm in baseline sleep and waking (light SLD, experiment 1; n = 6). B, Sleep deprivation during the light period in the condition of a weak diurnal rhythm in baseline sleep and waking (light SLD, experiment 2; n = 5). C, Sleep deprivation during the dark period in the condition of a weak diurnal rhythm in baseline sleep-waking (dark SLD, experiment 2; n = 4)