PMC4978951_01
(A) Hypnogram of nocturnal polysomnography for patient showing significant sleep fragmentation with frequent arousals and awakenings, particularly during N2 sleep. The image also shows the short sleep latency and frequent sleep onset REM episodes after awakenings. (B) Hypnogram of multiple sleep latency showing sleep onset REM in 4 of 4 nap periods.
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F1
Polysomnography (PSG) showed rapid sleep onset with rapid eye movement (REM) latency of 47 min (normal 70-110, full results given in Table 1, hypnogram of overnight sleep and multiple sleep latency is shown in Figure 1).