Site statistics

35210 facts from 177 countries related to 1198 phenomena have been registered in Archive. 2831 of them were solved, another 11024 are under verification for compliance with one of the 322 versions.

3 facts have been added for last 24 hours.

Share your story

You are in "Versions" section

This section includes information about possible versions explaining the true nature of the event described in the fact.

The state of sleep and dreams

Added Sun, 20/08/2017
Version type

Sleep is a natural physiological process of stay in a condition with minimal level of brain activity and reduced reaction to the world around us.

Sleep is essential to person to ensure the rest of the body, processing and storage of information, elaboration of unconscious models of expected events, organism's adaptation to changing light conditions (day and night) and recovery of immunity. In normal adult and healthy person it should last about 8 hours but depending on the situation this period can be from 4 to 10 hours. The sleep normally, sleep occurs cyclically, roughly every 24 hours. These cycles are called circadian rhythms.

Just before sleep induces a state of drowsiness, reduced activity of the brain. It is characterized by a decreased level of consciousness, yawning, lowering of the sensitivity of sensory systems and the secretory activities of glands (as a consequence of the sticking of the eyelids), as well as the change in heart rate.
The structure of the dream consists of a series of steps, regularly repeated during the night, the appearance of which is due to the activity of different brain structures.

In a healthy person the dream begins with the first stage of NREM sleep (Non-REM sleep), which lasts 5-10 minutes. Then comes stage 2, which lasts about 20 minutes. Even 30-45 minutes is between 3-4 stages. After that, the sleeper returns to the 2nd stage of NREM sleep, after which there is the first episode of REM sleep, which has a short duration – about 5 minutes. This entire sequence is called a cycle. On average, healthy sleep is celebrated for five full cycles. REM sleep cycle-to-cycle is lengthened, and the depth of sleep decreases.

If during REM sleep stage to Wake up the sleeping, then in 90% of cases you will hear a story about a vivid dream.

Translated by «Yandex.Translator»

Related facts

Related news

Related articles

Log in or register to post comments

Site friends

  • Мир тайн — сайт о таинственном
  • Activite-Paranormale
  • UFOlats
  • Новый Бестиарий
  • The Field Reports
  • UFO Meldpunt Nederland
  • Паранормальная наука, наука об аномалиях
  • Новости уфологии
  • UFO Insights
  • Mundo Ovnis



Site contains materials that are not recommended for impressionable people.

You are reporting a typo in the following text:
Simply click the "Send typo report" button to complete the report. You can also include a comment.