Effects of prolonged wakefulness on cyclic alternating pattern (CAP) during sleep recovery at different circadian phases

Two separate groups of healthy subjects aged between 20 and 30 years underwent a random sequence of two non-consecutive polysomnographic recordings under standard conditions (night basal sleep) and after continuous sleep deprivation (recovery sleep). In the first group of 6 subjects (3 males and 3 females) recovery sleep occurred in the morning (after 24 h of prior waking); in the second group of 6 subjects (3 males and 3 females) recovery sleep...