Table 1 Vigilance states under T20 conditions (% [mean ± SEM]).

		20-h	10-h Dark	10-h Light	LD Ratios	P (LD)
W	1^st T20	47.5 ± 1.4	61.9 ± 1.5	33.0 ± 2.4	0.54 ± 0.04	0.002
	4^th T20	47.5 ± 1.4	43.9 ± 2.1	51.1 ± 2.6	1.17 ± 0.09	0.13
	7^th T20	50.5 ± 0.4	66.9 ± 2.1	34.1 ± 1.8	0.51 ± 0.04	0.001
	P (T20)	0.14	<0.0001	0.0004		0.006
NREMS	1^st T20	44.3 ± 1.4	34.1 ± 1.4	54.5 ± 2.3	1.61 ± 0.09	0.001
	4^th T20	44.0 ± 1.0	45.9 ± 1.8	42.0 ± 1.8	0.92 ± 0.06	0.26
	7^th T20	41.8 ± 1.1	29.9 ± 1.7	53.7 ± 2.6	1.83 ± 0.17	0.003
	P (T20)	0.27	<0.0001	0.0055		0.007
REMS	1^st T20	8.2 ± 0.5	4.0 ± 0.6	12.4 ± 0.7	3.40 ± 0.55	0.002
	4^th T20	8.5 ± 0.7	10.2 ± 0.9	6.9 ± 1.0	0.69 ± 0.12	0.058
	7^th T20	7.7 ± 0.9	3.2 ± 0.8	12.2 ± 1.2	6.27 ± 2.54	0.01
	P (T20)	0.14	<0.0001	0.0003		0.009

Percentage of wakefulness, non-rapid eye movement sleep (NREMS) and rapid eye movement sleep (REMS) (% of total recording time), and Light/Dark (L/D) ratios (amount of vigilance state spent in the 10-h light phase/10-h dark phase) (B6: n = 5). Statistics are indicated by P values for the ‘T20 cycle effect’ (1-way ANOVA), interaction ‘T20 cycle x Phase’ (2-way ANOVA), and for the Light-Dark difference (paired t-tests).

Quick links

Search