Table 3.

Sleep-wake characteristics at ZT3-4 during baseline and post-SD recovery sleep conditions in P22 and P30 rats (experiment 2)

Experimental Conditions and Groups	Total Sleep, %	Wakefulness, %
Spontaneous Sleep-wake in P22 rats (n = 6)	64.7 ± 1.2	35.3 ± 1.2
Recovery Sleep-wake in P22 rats (n = 6)	89 ± 2.7*	11 ± 2.7*
Spontaneous Sleep-wake in P30 rats (n = 6)	67.3 ± 2.9	32.7 ± 2.9
Recovery Sleep-wake in P30 rats (n = 6)	85.3 ± 3.2*	14.7 ± 3.2*

Values are means ± SE; n, no. of rats. The data were assessed by behavioral scoring, based on video recordings. Percentages of total sleep and wakefulness were calculated for the last 1-h video-recording period, before the rats were killed. Values of recovery sleep, in each age group, are compared with spontaneous sleep values. Percentage of wakefulness was significantly different between the two experimental conditions [in P22: t(10)9.8, P < 0.001; in P30: t(10)5.3, P < 0.001]. Percentage of total sleep during recovery vs. spontaneous sleep-wakefulness cycle was also significantly different [in P22: t(10)–9.8, P < 0.001; in P30: t(10)–5.3, P < 0.001].

^*Statistically significant difference.