zpostcode
Home
/
New Articles
/
NREM sleep
NREM sleep
Mar 17, 2026 2:37 AM

　　In full: non-rapid eye movement sleep (Show more) Also called: non-REM sleep (Show more) NREM sleep, one of two phases in the sleep cycle, considered the restful or quiet sleep phase. The other phase of the human sleep cycle is known as rapid eye movement (REM) sleep. A single sleep cycle, with both NREM and REM phases, lasts about 90 to 110 minutes; most adults complete the cycle four to six times per night. NREM sleep is conventionally subdivided into three stages—N1, N2, and N3—based on electroencephalography (EEG) criteria. N1 is a transitional stage, typically lasting one to seven minutes, as brain activity settles from wakefulness to sleep. This is represented electrically in the ...(100 of 651 words) Access the full article Help support true facts by becoming a member. Subscribe today!

Previous Article：Birkin bag Next Article：paramilitary
Comments
Welcome to zpostcode comments! Please keep conversations courteous and on-topic. To fosterproductive and respectful conversations, you may see comments from our Community Managers.
Sign up to post
Sort by
Show More Comments
Recommend >
sweet cherry
　　sweet cherry, (Prunus avium), species of cherry cultivated for its sweet, edible fruits. It is one of three types of cherries that are grown commercially, the others being tart cherries and dukes, which are crosses of sweet and tart cherries. A popular summer fruit, sweet cherries are usually consumed fresh and are the principal type preserved in true or imitation...
Proxima Centauri
　　 　　Proxima Centauri bArtist's impression of the surface of Proxima Centauri b, one of the closest extrasolar planets to the Sun. The planet has a mass at least 1.3 times that of Earth.(more)Proxima Centauri is the closest star to the Sun, about 4.2 light-years away in the Alpha Centauri system. As a red dwarf star—the most common type of star—Proxima...
tart cherry
　　tart cherry, (Prunus cerasus), species of cherry cultivated for its acidic fruits. Tart cherries are one of three types of cherries grown commercially, the others being sweet cherries and a cross of sweet and tart cherries known as dukes. Generally considered too acidic to eat fresh, tart cherries are commonly frozen or canned for use in sauces and pastries and...
geothermal heat pump
　　A geothermal heat pump (GHP) is a heating and cooling system that takes advantage of the relatively stable moderate temperature conditions within the first 300 meters (1,000 feet) below the surface of the Earth to heat a building in the winter and cool it in the summer. Unlike boilers or furnaces, GHPs do not rely on the combustion of fossil...
Information Recommendation
rhombus
　　rhombus, a four-sided, or quadrilateral, geometric figure in which all four sides are of the same length and each of the two pairs of opposite sides are parallel to each other. The word rhombus comes from the Greek rhombos, meaning “a spinning top” or “a piece of wood whirled on a string.” Rhombuses can be seen in everyday life, in...
reactive attachment disorder
　　reactive attachment disorder, rare condition in which infants and young children fail to form emotional bonds with their parents or other caregivers. The disorder is associated with trauma or other stressors that typically result from neglect or physical or emotional abuse and that affect early development. An estimated 1 to 2 percent of children are affected by reactive attachment disorder....
separation anxiety disorder
　　separation anxiety disorder, condition characterized by intense and prolonged concern, dread, worry, or apprehension about being separated from a loved one. Separation anxiety disorder is associated with significant distress, to the degree that it interferes with the affected individual’s ability to function, and can negatively impact mental health, academic and professional performance, and relationships with family and peers. 　　Separation anxiety...
sport climbing
　　sport climbing, a type of rock climbing in which climbers ascend a route that is equipped with preplaced permanent bolts, rather than placing temporary bolts as they climb and removing them on their descent, as is done in traditional rock climbing. It is a form of free climbing, meaning that upward progress is determined solely by the strength and movement...
Summer Olympic Games
　　Occurring every four years—provided there is no global war or pandemic—the Summer Olympic Games bring together athletes from across the world to compete for the love of country and sport. While the slate of events has changed over the years, with sports regularly being added and removed, perennially popular sports persist—including gymnastics, swimming, diving, volleyball, and track and field. The...
intracellular fluid
　　 　　cell See all media Category: Science & Tech Related Topics: cell fluid cytoplasm cytosol (Show more) See all related content → intracellular fluid, substance within living cells that is made up primarily of water and molecules such as dissolved ions and is a major component of the cytoplasm and cytosol. A variety of chemical reactions within cells take place...
polydactyly
　　polydactyly, condition that is present at birth in which a person has more than five fingers on a hand or more than five toes on a foot. The term polydactyly is derived from the Greek words poly, meaning “many,” and daktylos, meaning “digit.” Polydactyly occurs in an estimated 1 in 500–1,000 births, with variation from 1 in roughly 1,330 births...
plantar fasciitis
　　plantar fasciitis, swelling or degeneration of the plantar fascia, the thick band of connective tissue that runs across the bottom of the foot and connects the heel bone to the toes. Plantar fasciitis causes dull or stabbing pain, typically after a long period of rest, such as sleeping or sitting. The term fasciitis means “inflammation of the fascia”; however, because...
About
Terms and Conditions Privacy policy Cookie Settings Contact Us
Services
Login register
zpostcode Europe Asia North America South America Africa Oceania Global & Encyclopedia Geography & Travel
Links
zpostcode Recruit weather mreligion Yellowpages sport constellation shopping name game directory literature Word tour furnish Lottery tftnews lyrics News digital car dir Edu Finance
Copyright 2023-2026 - www.zpostcode.com All Rights Reserved