Figure 3

Hypnogram and sleep episode distribution in two representative patients. A) Frequency of sleep episode duration in a patient with high sleep continuity. Note that the number of sleep bouts is low. This patient spent most of his sleep time in naps lasting more than 10 minutes. Total sleep was 349 minutes. Inset: conventional hypnograms from 4 pm to 9 am. Arrow: median value (1.5 minutes); Dash arrow: 75th percentile value (4.75 minutes). B) Frequency of sleep episode duration in a patient with low sleep continuity. The number of bouts is high and there is only one nap lasting more than 10 minutes. This patient spent most of his sleep in bouts shorter than 10 minutes. Total sleep was 326 minutes. Inset: conventional hypnograms from 4 pm to 9 am. Arrow: median value (one minute); Dash arrow: 75th percentile value (two minutes).