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The nightmares usually occur during the REM stage of sleep, and the person who experiences the nightmares typically remembers them well upon waking. [2] More specifically, nightmare disorder is a type of parasomnia , a subset of sleep disorders categorized by abnormal movement or behavior or verbal actions during sleep or shortly before or after.
The research found that about 41 percent of sleepers who slept on one side had nightmares, compared to 14.6 percent of sleepers who turned the other way. Sleeping on one specific side could give ...
This helplessness can intensify the effects of the threat response well above the level typical of normal dreams, which could explain why such visions during sleep paralysis are so vivid. The threat-activated vigilance system is a protective mechanism that differentiates between dangerous situations and determines whether the fear response is ...
Sleep behavior undergoes substantial changes during adolescence. Some of these changes may be societal in humans, but other changes are hormonal. Another important change is the decrease in the number of hours of sleep, as compared to childhood, which gradually becomes identical to an adult.
The effects of the brain activity can interfere with the REM (rapid eye movement) part of sleep, where the majority of dreams and nightmares occur, which is around 90 minutes into sleep. REM is ...
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The most common sleep-related symptom of bipolar disorder is insomnia, in addition to hypersomnia, nightmares, poor sleep quality, OSA, extreme daytime sleepiness, etc. [27] Moreover, animal models have shown that sleep debt can induce episodes of bipolar mania in laboratory mice, but these models are still limited in their potential to explain ...
All of these are examples of circadian rhythm disorders, which are problems with the alignment between your sleep-wake cycle and your responsibilities for the day—like going to work or school ...