During daytime, there was almost no REM sleep at sound levels greater than 80 dBC; however, N3 sleep persisted.
Unrefreshing sleep persisted in at least 79% of the subjects across all periods but, as with most of the CFS symptoms, tended to be less frequent over time.
Even after the discovery of REM sleep, the "paradigm of dreaming as half-waking, half-sleeping, persisted" (Jouvet 1999: 5), and researchers only gradually came to regard REM sleep as a genuine and unique sleep stage.
An occasional sleepless night is a common complaint, but when difficulties initiating or maintaining sleep persist for months or years and cause daytime side effects such as fatigue and difficulty concentrating, the problem may be chronic insomnia [ 1].
For women with postpartum psychosis, though, difficulties with sleep persist even when they are given the opportunity to rest (as when a spouse, partner, friend, or relative agrees to care for the baby temporarily).
Women experience fewer respiratory disturbances during sleep; however, the sex differences in sleep impairment persisted after controlling for sleep-related respiratory disturbances [ 60, 61, 63].
A switch of medication should be considered when sleep problems persist after careful dose adjustment and dose-scheduling of the original medication; for instance, patients taking a stimulant medication might switch to atomoxetine.
Given the costs increased as sleep problems persisted, we recommend family doctors ask about sleep and, where problems exist, assess these in detail and provide families with suitable sleep management strategies.
Sleep deprivation persisted, exacerbated by the fact that Carol's attempts to catch up sleep with naps during day-time were hampered by the busy life on the ward.
Nonetheless, the fact that the increased costs associated with sleep problems persisted even after accounting for differences in health (overall health and SHCN) between children with and without sleep problems suggests that sleep problems themselves incur increased healthcare costs.
Perhaps this is why the trope of the sleeping woman persists, despite efforts to shut it out; its most recent appearances include Pedro Almodóvar's "Talk to Her," Julia Leigh's "Sleeping Beauty," and Anne Rice's "The Claiming of Sleeping Beauty," among many other works.
