Table 2.
Sleep-wake characteristics during spontaneous sleep and recovery sleep recorded in the same rats at different stages of postnatal development (experiment 1)
| Sleep-Wake Characteristics at ZT3–4 | Spontaneous sleep-Wake on P21 | Recovery Sleep-Wake on P22 | Spontaneous Sleep-Wake on P29 | Recovery Sleep-Wake on P30 Rats |
|---|---|---|---|---|
| Wakefulness, % | 41.7 ± 2.4* | 18.3 ± 1.3* | 29.4 ± 2.0* | 9.6 ± 1.3* |
| NREM sleep, % | 42.5 ± 2.6* | 64.8 ± 2.3* | 56.6 ± 1.9* | 78.7 ± 1.5* |
| REM sleep, % | 15.8 ± 0.8 | 16.9 ± 2.6 | 14.0 ± 0.6 | 11.7 ± 0.8* |
| EEG SWA, μV2 | 2,794.0 ± 102.4* | 4,295.6 ± 141.1 | 4,631.2 ± 70.4 | 6,760.3 ± 104.8* |
| Mean duration of NREM sleep episodes, min | 1.6 ± 0.1 | 1.7 ± 0.1 | 2.5 ± 1.2* | 4.3 ± 1.4* |
| Mean duration of REM sleep episodes, min | 1.4 ± 0.1 | 1.2 ± 0.1 | 1.4 ± 0.2 | 1.1 ± 0.1 |
Values are means ± SE; n = 6 rats in each group. ZT, Zeitgeber time. Data are assessed by the analysis of EEG/EMG recordings. EEG SWA, slow-wave activity represented by power density in the 0.5- to 4.0-Hz band.
*
Different from all other groups (repeated-measures ANOVA followed by pairwise multiple comparison procedures, Holm-Sidak method).