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Sleep can follow a physiological or behavioral definition. In the physiological sense, sleep is a state characterized by reversible unconsciousness, special brainwave patterns, sporadic eye movement, loss of muscle tone (possibly with some exceptions; see below regarding the sleep of birds and of aquatic mammals), and a compensatory increase following deprivation of the state, this last known ...
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 ...
REM sleep, also known as paradoxical sleep, represents a smaller portion of total sleep time. It is the main occasion for dreams (or nightmares), and is associated with desynchronized and fast brain waves, eye movements, loss of muscle tone, [18] and suspension of homeostasis. [19] The sleep cycle of alternate NREM and REM sleep takes an ...
REM sleep is when many dreams occur, and if you get a full night’s sleep, you should have entered REM sleep multiple times throughout the night. ... According to Gover, the appearance of animals ...
The flowerpot technique is an animal testing technique used in sleep deprivation studies. It is designed to allow NREM sleep but prevent restful REM sleep . The test is usually performed with rodents .
Deep sleep allows the body to release growth hormone while it works to build and repair muscles, bones, and tissue, and strengthen immune system functioning, according to the Sleep Foundation. REM ...
Primary sleep disorders such as chronic insomnia and obstructive sleep apnea may also affect REM sleep. Common medications such as antidepressants or benzodiazepine medications like diazepam ...
The correlates of sleep found for mammals are valid for birds as well i.e. bird sleep is very similar to mammals and involves both SWS and REM sleep with similar features, including closure of both eyes, lowered muscle tone, etc. [37] However, the proportion of REM sleep in birds is much lower. Also, some birds can sleep with one eye open if ...