Table 1. Probability matrix of transitions between states and of remaining in a state for discrete time steps of 5 seconds applying a four-state Markov model to fit the mouse sleep-wake dynamics along 12/12h dark/light cycle.

Dark filled cells, dark period; light filled cells, light period.

	Long W	REM	NREM	Brief W
Long W	0.996289038	0.0001353482	0.003576614	0.00000000
REM	0.002403548	0.9638222661	0.030798463	0.002975273
NREM	0.003758884	0.0025628484	0.991916088	0.001762179
Brief W	0.000000000	0.000000000	0.059201561	0.940798439
Long W	0.994275350*↓	0.0001319087	0.005592741*↑	0.000000000
REM	0.003242978	0.9636607238	0.030080758	0.003015540
NREM	0.002976289	0.0027375917	0.992825566	0.001460553
Brief W	0.000000000	0.0012345679	0.058272307	0.949493125

t−student, p < 0.05 (*)