25 things that happen to our body during sleep

There are many reasons why sleep is the favorite pastime for many people. This calm part of our day is vital to both our physical and mental health - it is a state where we can dream, relax and replenish our energy.

25. Body temperature drops

Since most of the muscles in the body become inactive during sleep, the body burns fewer calories than during wakefulness, so the body temperature drops. Scientists have found that the lowest body temperature in a person during sleep is at 02:30.

24. Eyes moving

Although closed by the eyelids, the eyes move in a dream. Their movements even differ depending on the stage of sleep. At first, they roll smoothly, and then, when a person falls into a deep sleep, they begin to move quickly. However, a person, as a rule, does not remember this.

23. Body twitching convulsively

Sudden twitching and twitching are most often associated with the first stages of sleep. They are usually harmless, but they can be quite strong - sometimes to the point that they can actually wake you up.

22. Muscles paralyzed

There is a compelling reason why most muscles are paralyzed during sleep: if they were active, then a person in a dream could act, and this, of course, would be extremely dangerous.

21. The skin is self-healing

The top layer of the skin is made up of hardened dead cells that are shed during the day. During sleep, the skin's metabolic rate increases and many cells in the body exhibit increased production and decreased protein breakdown. Since proteins are essential for cell growth and repair of damaged skin from factors such as UV rays, deep sleep can truly be called "beauty sleep."

20. The brain forgets unnecessary information

“We receive a lot of information throughout the day, and most of it is thankfully forgotten, ” says sleep specialist Christopher Colwell of UCLA School of Medicine. - If you memorized everything that you learned or heard for the whole day, then the brain, in order not to overflow with information, during sleep will begin the sorting process, filtering out the excess.

19. Throat narrows

Unlike most other muscles, the throat muscles are not paralyzed during sleep, as they are needed for breathing. However, they become more relaxed, causing the throat to narrow. It also likely contributes to snoring.

18. The body produces hormones

During slow wave sleep, the human body produces growth hormones that stimulate cell growth, reproduction and regeneration. Sleep, even if it is daytime, promotes the release of prolactin, an important regulator of the immune system.

17. The immune system is at its peak

Sleep deprivation has been shown to have an impact on the immune system. One study found that people who were vaccinated against the flu and deprived of sleep the next night failed to develop the antibodies needed to protect themselves from the flu. Therefore, as soon as a person has the first signs of infection, you should get enough sleep as long as the immune system needs to fight the disease.

16. Man loses weight

During sleep, a person loses fluid by sweating and exhaling moist air. This happens throughout the day, however, drinking and eating will negate any weight loss. Therefore, good quality and long sleep is essential with any diet to be successful.

15. Mouth gets dry

Since saliva is mainly needed for the feeding process, and a person does not eat in a dream, the salivary flow at night is reduced. Consequently, a person may feel dry mouth and feel thirsty when they wake up in the morning.

14. Human can grind teeth

It is estimated that around 5% of people suffer from a strange condition known as bruxism. This parafunctional activity manifests itself in excessive grinding of teeth and can ultimately lead to tooth damage. Scientists aren't sure what exactly causes this condition, but believe it could be a form of stress relief.

13. Body elongates

It has been found that people in the morning can be several centimeters taller than the night before. During sleep in a horizontal position, the spine is stretched, since the weight of the body does not press on it from above.

12. Blood pressure decreases

During sleep, a person experiences what is called a "night dip" of blood pressure.

11. A person can walk in a dream

Known scientifically as parasomnias, sleepwalking and other sleep activities include behaviors, emotions, sensations, and dreams that typically occur during the transitions between certain sleep phases. Parasomnia is mostly harmless, but there have been cases where people have been injured during sleepwalking.

10. A person can be intimately aroused

Both men and women can become aroused in their sleep. Since the brain is more active during sleep, it requires more oxygen. As a result, blood flow throughout the body increases, causing the genitals to swell.

9. We dream

The content and purpose of dreams are not fully understood, but it is known that, on average, a person sees 3-5 dreams per night. Dreams are mainly seen in the first phase of sleep, when our brain is more active. However, we forget most dreams immediately and quickly.

8. The brain makes decisions

A recent study has shown that the brain can process information and prepare for activities during sleep by effectively making decisions while unconscious. In fact, our brains can even make important findings and discoveries while we sleep.

7. That flatulence

It is unlikely that anyone will be happy to know about this, but at night, the muscles of the anal sphincter relax slightly, releasing gases that have accumulated in the intestines. The good news is that during sleep, a person's sense of smell is not as keen as during wakefulness, so the release of gas at night usually goes unnoticed.

6. The body is completely cleansed of toxins

Getting rid of toxins allows our body and brain to regenerate. Filtration is not as effective in poorly sleeping people, which is why experts believe this may explain why people who are sleep deprived for a long time can get a little crazy.

5. We wake up without realizing it

Scientific studies have shown that people wake up in their sleep many times - it sounds, of course, strange, but it is. These revivals are so brief that we don't remember them. They usually occur during the transition between different stages of sleep.

4. Breathing may stop during sleep

Millions of people around the world suffer from a disorder known as sleep apnea. The disorder is characterized by pauses in breathing or cases of shallow breathing during sleep. Each pause can last from a few seconds to several minutes.

3. Human can hear explosions

Exploding head syndrome is a rare, harmless condition in which a person hears a loud sound of imaginary noises (such as a bomb explosion, gunshot, hitting a musical cymbal, etc.) or experiences an explosion-like sensation when falling asleep or waking up. It is painless, but it scares the person who suffers from it.

2. A person can speak in a dream

Sleep talk - parasomnia, which refers to speaking aloud while sleeping. It can be quite loud, ranging from mumbling sounds to screams and prolonged, most often slurred speeches. This can happen repeatedly during sleep.

1. Pain threshold rises

When a person's body is completely relaxed to a state of paralysis, the nerves cannot receive pain signals and transmit these signals to the brain. It also explains why, while we sleep, we cannot hear, smell, see, or experience sensations.