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Epileptic seizure, nightmares. Night terror, also called sleep terror, is a sleep disorder causing feelings of panic or dread and typically occurring during the first hours of stage 3–4 non-rapid eye movement (NREM) sleep [1] and lasting for 1 to 10 minutes. [2] It can last longer, especially in children. [2]
The night hag is a generic name for a folkloric creature found in cultures around the world, and which is used to explain the phenomenon of sleep paralysis. A common description is that a person feels a presence of a supernatural malevolent being which immobilizes the person as if standing on the chest. [40] This phenomenon goes by many names.
Nightmare disorders can also be associated with sleep disorders such as night terrors, chronic insomnia and sleep-disordered breathing. [5] The presence of nightmares before a trauma would influence severity of PTSD symptoms. [12] Furthermore, having nightmares is linked to a significantly higher risk of attempting suicide and of death by ...
Sleepwalking, also known as somnambulism or noctambulism, is a phenomenon of combined sleep and wakefulness. [1] It is classified as a sleep disorder belonging to the parasomnia family. [2] It occurs during the slow wave stage of sleep, in a state of low consciousness, with performance of activities that are usually performed during a state of ...
Sleep disorder. A sleep disorder, or somnipathy, is a medical disorder of an individual's sleep patterns. Some sleep disorders are severe enough to interfere with normal physical, mental, social and emotional functioning. Sleep disorders are frequent and can have serious consequences on patients' health and quality of life. [1]
Nightmare. A nightmare, also known as a bad dream, [1] is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also despair, anxiety, disgust or sadness. The dream may contain situations of discomfort, psychological or physical terror, or panic. After a nightmare, a person will often awaken in a state ...
The onset of symptoms is usually within 2 and 3 hours of sleep onset (at the time of transition from slow-wave sleep to a lighter sleep stage) and those events can last from 10 to 30 minutes. Patients generally wake up without any recollection of the event.
Excessive daytime sleepiness (EDS) is characterized by persistent sleepiness and often a general lack of energy, even during the day after apparently adequate or even prolonged nighttime sleep. EDS can be considered as a broad condition encompassing several sleep disorders where increased sleep is a symptom, or as a symptom of another ...