REM sleep


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rap·id eye move·ment sleep

, REM sleep
that state of deep sleep in which rapid eye movements, alert EEG pattern, and dreaming occur; several central and autonomic functions are distinctive during this state.

REM sleep

n.
A period of sleep during which dreaming takes place, characterized by rapid periodic twitching movements of the eye muscles and other physiological changes, such as accelerated respiration and heart rate, increased brain activity, and muscle relaxation. REM sleep is the fifth and last stage of sleep that occurs in the sleep cycle, preceded by four stages of non-REM sleep. Also called paradoxical sleep.

REM sleep

Rapid eye movement sleep, desynchronized sleep, paradoxical sleep Neurology A 5 to 20 min segment of a normal sleep cycle, characterized by irregular heart rate and respiration, BP, EEG similar to awake and alert state, involuntary or jerky muscle movement, and higher threshold for arousal; the usual high-amplitude slow brain waves seen by EEG are replaced by rapid eye movement and rapid, low-voltage irregular EEG activity. See Insomnia, Sleep disorders.

REM sleep

Rapid eye movement sleep. This occurs during about 20% of the sleeping time and features constant movement of the eyeballs, twitching of the muscles and erection of the penis in men. REM sleep is deep and is associated with dreaming. It is necessary for health.

REM sleep

Rapid Eye Movement phase of sleep, a mentally active period during which dreaming occurs.
Mentioned in: Night Terrors
References in periodicals archive ?
RSWA was scored according to a previously published method:[sup][12] each 20 s REM sleep epoch was scored as tonic depending on the presence of chin EMG activity for more than 50% of each epoch, with an amplitude of at least twice that of background activity or >10 [micro]V.
Attaining REM sleep may be likened to sorting those recordings into packets that make sense and are easily retrievable for procedural memory usage.
Interfering with theta waves during other stages of sleep didn't seem to cause memory trouble, suggesting that something special happens during REM sleep.
Best practice guide for the treatment of REM sleep behavior disorder (RBD).
With representative colors of EEG power, it was clear to identify periods of wakefulness, slow wave sleep and REM sleep.
Patients who remained disease-free at follow-up showed markers of increased short-term risk for developing PD," including lesions "in the brainstem nuclei that regulate REM sleep atonia," the Spanish researchers found.
RBD is characterized by the loss of muscle relaxation during REM sleep and complex, dream-related movements during REM.
Disorders of Arousal (from Non-REM sleep) Parasomnias usually associated with REM sleep, and Other parasomnias which also includes secondary type of parasomnias.
When in REM sleep, reduced muscle tone, reduction in neck/nuchal muscle tone, rapid eye movements, cardio-respiratory changes, erection in males and clitoral engorgement in females, and species-specific body posture can be observed.
UC Berkeley researchers have found that during the dream phase of sleep, also known as REM sleep, our stress chemistry shuts down and the brain processes emotional experiences and takes the edge off of difficult memories.
With the aim of studying the REM sleep function in the ontogenetic development of the animals, neonatal rats were deprived of REM sleep through the daily administration of a powerful suppressor of it: CLI (Mirmiran, van de Poll, Corner, de Boer, & van Oyen, 1980; Mirmiran, van de Poll, Corner, van Oyen, & Bour, 1981).
REM sleep, also considered to be restful sleep, comprises about 20 to 25% of sleep in healthy subjects (2,3).