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8 Αυγ 2008 · To characterize nocturnal event histories in the sleep hypnogram, two distinct methods were employed: multistate survival analysis and log-linear models.
for transitioning between rapid eye movement (REM) and non-REM (NREM) sleep,5 adequately characterizing sleep-stage transitions is a priority to better define the influence of specific factors (e.g., age and sex) on normal sleep structure and orga-nization.
1 Δεκ 2023 · Sleep stage distribution, sleep cycles, and fragmentation are strong predictors of how an expert interprets a hypnogram. By comparing hypnograms not solely on an epoch-by-epoch basis, but also on these more specific features that drive the evaluation by experts, performance assessment of (automatic) sleep-staging and surrogate sleep trackers ...
The hypnogram is a schematic representation of a period/night of sleep composed of 5 sleep cycles in which the different sleep stages (NREM N1, N2, and N3 and REM sleep) alternate....
1 Σεπ 2015 · Sleep hypnograms (left) of the same 10 epoch (5 min) sleep trajectory as represented in 5-stage, 3-stage, and 2-stage sleep resolution (horizontal axis in epochs, with the 1st, 5th, and 9th epoch labeled) and accompanying Poisson regression and multi-state survival model data formats (right).
There are 4–5 sleep cycles across a night with slow wave sleep predominating in the first part of the night and the REM sleep becoming more prevalent in the second half of the night. REM sleep is associated with muscle atonia and is usually when dreams may be experienced.
A hypnogram is used to give an overview of the staging of sleep for the entire night (see Figure 2 for an example). In adults, sleep consists of two main phases: 1.) Non-rapid eye movement...
