There are many things we don’t know about dreams. Why do we see them or why is it so impor­tant to sleep. But there is one thing we know for sure: we feel bet­ter when we sleep, both phys­i­o­log­i­cal­ly and men­tal­ly. And when we get enough sleep, we also work bet­ter.

So what hap­pens to us while we sleep? Sci­en­tists know the answers.

As soon as you fall asleep…

1. You start to “fall”

The sen­sa­tion of a sud­den fall while falling asleep is what researchers call a hyp­not­ic jerk, a sud­den con­trac­tion or twitch­ing of the mus­cles. And this is a com­mon occur­rence. About 70% of peo­ple expe­ri­ence it while falling asleep, but most often they sim­ply do not notice it. But hyp­not­ic jerks can be quite strong, so much so that a per­son can wake up.

2. The brain sorts and processes information

2. The brain sorts and processes information

Many peo­ple think that while they sleep, the brain final­ly gets a chance to rest a bit. But no mat­ter how! It turns out that even at night he works hard. While a per­son sees won­der­ful dreams, the brain process­es the infor­ma­tion received dur­ing the day.

This process is of great impor­tance for the cre­ation of long-term mem­o­ries, since the brain col­lects and process­es all the infor­ma­tion it has received and stores it for future use.

3. The brain gets rid of unnecessary data

How much use­less infor­ma­tion does a per­son receive dur­ing the day? Unfor­tu­nate­ly, a lot. And at night the brain gets rid of it, “block­ing” indi­vid­ual synaps­es. These data were pub­lished in the sci­en­tif­ic jour­nal Sci­ence.

If the brain did not do this, we would sim­ply not be able to learn. Remov­ing every­thing unnec­es­sary allows us to fill mem­o­ry spaces with new, use­ful things or just as use­less as they were removed. Each per­son choos­es for him­self what to remem­ber and keep.

4. Hormone levels change in the body

The main hor­mone, the con­cen­tra­tion of which increas­es in the dark, is mela­tonin — the sleep hor­mone. It is respon­si­ble for the bio­rhythms of the body and helps the body to eas­i­ly fall asleep and wake up, ful­ly rest. This hor­mone is pro­duced by the pineal gland.

While a per­son is sleep­ing, the pitu­itary gland also pro­duces more growth hor­mone. It helps the body not only grow and get stronger, but also recov­er from phys­i­cal exer­tion. It also sup­ports the growth of bones and mus­cles, con­trols metab­o­lism.

By the way!

Stud­ies by sci­en­tists have shown that before the full moon, peo­ple go to bed lat­er and spend less time sleep­ing. But what is the rea­son, the researchers do not yet know.

5. The sympathetic nervous system relaxes

5. The sympathetic nervous system relaxes

The sym­pa­thet­ic ner­vous sys­tem is respon­si­ble for the “fight or flight” posi­tion dur­ing stress. When a per­son sleeps at night, she has a chance to “relax”. At the same time, stud­ies have shown that if a per­son is deprived of qual­i­ty sleep, the activ­i­ty of his sym­pa­thet­ic sys­tem increas­es. And this, in turn, often leads to an increase in blood pres­sure.

Sci­en­tists are now try­ing to find out if there is a link between coro­nary heart dis­ease and reduced sleep dura­tion. While the answer is being pre­pared, we know one thing for sure: sound, rest­ful sleep is con­ducive to heart health.

6. Reduced stress levels

In the first few hours after falling asleep, the lev­el of the stress hor­mone cor­ti­sol drops sig­nif­i­cant­ly in the body. But not for long. Before a per­son wakes up, he will again reach his peak val­ues.

Sci­en­tists explain that this is nec­es­sary so that a per­son after wak­ing up feels vig­or­ous and ener­getic, and also has a good appetite. Yes, cor­ti­sol, among oth­er things, makes you want to snack.

7. Your muscles lose their ability to move.

In cer­tain phas­es of sleep, a per­son los­es the abil­i­ty to move, the mus­cles seem to be tem­porar­i­ly “par­a­lyzed”. This is nec­es­sary so that when you see in a dream that you need to run, a per­son does not rush to run in real­i­ty — head­long and injur­ing him­self. So nature took care of our safe­ty.

Dur­ing a night’s rest, a per­son switch­es between peri­ods of REM sleep (rapid eye move­ment phase) and non-REM sleep. Dur­ing REM sleep, a per­son sees the most vivid dreams and at the same time he is actu­al­ly “immo­bi­lized”. This sys­tem does not affect only two mus­cle groups — res­pi­ra­to­ry and ocu­lar.

8. The “no pee” mechanism is activated

8. The

Have you ever won­dered why dur­ing day­light hours a per­son needs to go to the bath­room every two hours on aver­age to emp­ty their blad­der, but at night they can sleep peace­ful­ly for 8 hours with­out going to the bath­room?

It turns out that the whole thing is in a spe­cial hor­mone. Its name is antid­i­uret­ic hor­mone (ADH). It is a pep­tide hor­mone of the hypo­thal­a­mus, which is pro­duced in the body of most mam­mals. It reduces the need to uri­nate fre­quent­ly, so that a per­son can safe­ly wait until the morn­ing.

Did you know?

The moments of walk­ing in a dream in most lunatics are observed 1–2 hours after falling asleep.

9. The immune system “overloads” the body

While the body sleeps, the immune sys­tem pro­duces spe­cial pro­teins called cytokines. If a per­son is sick or injured in any way, cytokines help the body fight inflam­ma­tion, infec­tion, and injury. They seem to “over­load” the body.

This explains why with­out enough sleep, the immune sys­tem can­not func­tion ful­ly and its defense mech­a­nisms are reduced.

10. You become more beautiful

Cos­me­tol­o­gists have such a thing as a “beau­ty dream”. They believe that after a good night’s rest, a per­son looks more beau­ti­ful. And indeed it is. Sleep brings youth.

Those recov­ery process­es that we men­tioned above also apply to col­la­gen in the inner lay­ers of the skin. The restora­tion of col­la­gen improves the elas­tic­i­ty and firm­ness of the skin, it looks fresh­er and younger.

11. You may have the same dreams.

11. You may have the same dreams.

Some peo­ple have dreams that deal with the same top­ic, so they feel like the dreams are repet­i­tive. If these dreams are night­mares, they nat­u­ral­ly cause stress.

Experts say that recur­ring night­mares are a seri­ous phe­nom­e­non that is asso­ci­at­ed with high lev­els of anx­i­ety and can be a symp­tom of depres­sion or post-trau­mat­ic stress dis­or­der, as well as some men­tal ill­ness­es.

12. Sleep can ruin your health.

But only when there is too much of it. This con­di­tion is called hyper­som­nia and means an exces­sive amount of sleep. When a per­son “over­sleeps”, they expe­ri­ence severe day­time sleepi­ness dur­ing the day and can­not be ful­ly awake.

Stud­ies show that hyper­som­nia is asso­ci­at­ed with a change in the archi­tec­ture of sleep — a decrease in deep sleep and an increase in REM sleep. Ulti­mate­ly, this neg­a­tive­ly affects the qual­i­ty of night rest. That’s why it’s so impor­tant not to over­sleep.

On a note!

Accord­ing to som­nol­o­gists, the most ter­ri­ble ene­my of mankind, which pre­vents him from ful­ly sleep­ing, is round-the-clock access to the Inter­net. For many of us, in order to get enough sleep, it is enough to turn off the com­put­er on time.

Sweet Dreams!

От Yraa

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