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Rapid eye movement (REM) sleep is a stage in the sleep cycle when vivid dreaming occurs. REM sleep helps with information processing and consolidation. REM latency (REML) is the amount of time it ...
Rapid eye movement sleep (REM sleep or REMS) is a unique phase of sleep in mammals (including humans) and birds, characterized by random rapid movement of the eyes, accompanied by low muscle tone throughout the body, and the propensity of the sleeper to dream vividly. The core body and brain temperatures increase during REM sleep and skin ...
Sleep deprivation increases this propensity, which can be measured by polysomnography (PSG) as a reduction in sleep latency (the time needed to fall asleep). [69] An indicator of sleep propensity can also be seen in the shortening of the transition from light stages of non-REM sleep to deeper slow-wave oscillations. [69]
A sleep onset latency of 0 to 5 minutes means severe sleep deprivation, 5 to 10 minutes is "troublesome", 10 to 15 minutes indicates a mild but "manageable" degree of sleep debt, and 15 to 20 minutes is indicative of "little or no" sleep debt. [1]: 341–342
NREM Stages. Three stages of sleep make up the NREM phase, and they each unfold before REM kicks in. Here’s a rough breakdown of what happens during each stage of NREM sleep:. Stage 1: light ...
After going through stages of REM-sleep, people with depression report feeling better, in a study done by Cartwright et al. [40] Conversely, a theory proposed by Revonsuo [41] states that when people experience negative emotions or negative events, when they sleep the REM-sleep replays such events, which is known as rehearsal. [39]
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