sleep stage 2

sleep stage 2

NREMS stage 2 Sleep disorders A stage of NREM sleep Accounts for 45-55% of total sleep time
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(40), 4 human scorers participated in the study and reported values of the Kendall W coefficient of concordance above 0.9 for total CAP time, CAP time in sleep stage 2, and percentage of A phases in sequence; the CAP rate also showed a high value.
(2014) Repeated measures ANOVA Note: S1 = Sleep stage 1; S2 = Sleep stage 2. Table 2 Repeated measures ANOVA of EEG Derivation EEG F gl eta O1 Delta 4.346 (*) 9.40 .204 Theta 3.338 (*) 9.26 .164 Alfa 12.576 (*) 7.44 .425 Beta 7.561 (*) 7.07 .308 Beta/Delta 9.828 (*) 8.87 .366 O2 Delta 4.361 (*) 9.12 .204 Theta 3.025 (*) 8.12 .151 Alfa 12.574 (*) 8.23 .429 Beta 7.622 (*) 7.68 .310 Beta/Delta 10.561 (*) 9.10 .383 Note: O1 = left occipital; O2 = right occipital; (*) p < .005.
Sp[O.sub.2]: minimum oxyhaemoglobin saturation; N1: sleep stage 1; N2: sleep stage 2; N3: sleep stage 3; ODI: oxygen desaturation index; REM: rapid eye movement; TST: total sleep time.
(3) NREM sleep stage 2 (NREM2): in this stage, the EEG amplitude becomes higher, sleep spindles (11-15 Hz), and K-complexes appear.
The horizontal axis in Figure 2 represents sleep stages of awake stage, REM, sleep stage 1, sleep stage 2, and slow wave sleep.
(a) Fast delta oscillations in REM sleep (same child shown in Supplementary Figure S2); (b) fast delta oscillations in NREM sleep stage 2 (same child shown in Supplementary Figure S2); (c) theta oscillations in NREM sleep stage 2 (same child shown in Supplementary Figure S4); and (d) sleep spindles in NREM sleep stage 2 (same child shown in Supplementary Figure S6) are illustrated.
Control Test TST/min 390(44) 368 (54) N1/min 42 (16, 46) 39 (17) N2/min 263 (52) 248 (40) N3/min 21 (17) 4(0, 16)* REM/min 66 (22) 70 (22) N1% 11.2 (4.0, 12.2) 10.7 (4.3) N2% 67.1 (8.7) 68.1 (7.6) N3% 5.2 (4.2) 1.3 (0.0, 4.1) REM% 17.0 (5.6) 18.4 (4.4) ArI/[h.sup.-1] 15.1 (3.1) 43.9 (9.1)([dagger]) TST, total sleep time; N1, non-rapid-eye movement sleep stage 1; N2, non- rapid-eye movement sleep stage 2; N3, non-rapid-eye movement sleep stage 3; REM, rapid-eye movement sleep; N1%, the percentage of N1; N2%, the percentage of N2; N3%, the percentage of N3; REM%, the percentage of REM; ArI, arousal index; * P < 0.05 from control condition; ([dagger]) < 0.001 from control condition.