Why do we dream? - Amy Adkins

8,487,929 views ・ 2015-12-10

TED-Ed


Please double-click on the English subtitles below to play the video.

Prevodilac: Milenka Okuka Lektor: Mile Živković
00:06
In the third millenium BCE,
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U trećem milenijumu p.n.e.
00:08
Mesopotamian kings recorded and interpreted their dreams on wax tablets.
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mesopotamski kraljevi su beležili i tumačili svoje snove na voštanim pločama.
00:13
A thousand years later,
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Hiljadu godina kasnije
00:15
Ancient Egyptians wrote a dream book
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drevni Egipćani su napisali knjigu o snovima,
00:17
listing over a hundred common dreams and their meanings.
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nabrajajući stotinu uobičajenih snova i njihovih značenja.
00:20
And in the years since,
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A narednih godina
00:21
we haven't paused in our quest to understand why we dream.
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nismo napravili predah u našem pohodu na razumevanje zašto sanjamo.
00:25
So, after a great deal of scientific research,
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Pa, nakon obimnog naučnog istraživanja,
00:28
technological advancement,
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tehnološkog napretka
00:29
and persistence,
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i istrajnosti,
00:31
we still don't have any definite answers, but we have some interesting theories.
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još uvek nemamo nedvosmislene odgovore, ali imamo neke zanimljive teorije.
00:36
We dream to fulfill our wishes.
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Sanjamo da bismo ostvarili naše želje.
00:40
In the early 1900s,
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Ranih 1900-ih,
00:42
Sigmund Freud proposed that while all of our dreams, including our nightmares,
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Sigmund Frojd je pretpostavio da, dok su svi naši snovi, uključujući i noćne more,
00:46
are a collection of images from our daily conscious lives,
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zbirke prizora iz naših dnevnih, svesnih života,
00:49
they also have symbolic meanings,
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takođe imaju simbolična značenja,
00:51
which relate to the fulfillment of our subconscious wishes.
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koja se odnose na ispunjenje naših podsvesnih želja.
00:55
Freud theorized that everything we remember when we wake up from a dream
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Frojdova teorija je bila da je sve čega se sećamo kad se probudimo iz sna
00:59
is a symbolic representation
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simbolična predstava
01:01
of our unconscious primitive thoughts, urges, and desires.
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naših nesvesnih primitivnih misli, poriva i žudnji.
01:05
Freud believed that by analyzing those remembered elements,
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Frojd je verovao da bi se analizom tih zapamćenih elemenata,
01:08
the unconscious content would be revealed to our conscious mind,
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nesvesni sadržaj razotkrio našem svesnom umu,
01:12
and psychological issues stemming from its repression
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a psihološki problemi koji proizlaze iz potiskivanja
01:14
could be addressed and resolved.
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bi mogli da budu obrađeni i razrešeni.
01:17
We dream to remember.
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Sanjamo da bismo pamtili.
01:20
To increase performance on certain mental tasks,
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San je dobar za poboljšanje učinka određenih mentalnih zadataka,
01:23
sleep is good,
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01:24
but dreaming while sleeping is better.
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međutim sanjanje uz spavanje je bolje.
01:27
In 2010, researchers found
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Godine 2011, istraživači su otkrili
01:28
that subjects were much better at getting through a complex 3-D maze
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da su subjekti mnogo bolji u snalaženju u složenom 3D lavirintu,
01:32
if they had napped and dreamed of the maze prior to their second attempt.
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ako su dremali i sanjali o lavirintu pred njihov drugi pokušaj.
01:37
In fact, they were up to ten times better at it
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Zapravo, bili su 10 puta bolji u tome
01:39
than those who only thought of the maze while awake between attempts,
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od onih koji su između pokušaja samo budni razmišljali o lavirintu
01:44
and those who napped but did not dream about the maze.
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i onih koji su dremali, ali nisu sanjali o lavirintu.
01:48
Researchers theorize that certain memory processes
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Istraživači imaju teoriju da se određeni memorijski procesi
01:51
can happen only when we are asleep,
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jedino mogu desiti dok spavamo,
01:53
and our dreams are a signal that these processes are taking place.
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a naši snovi su signal da se ovi procesi dešavaju.
01:58
We dream to forget.
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Sanjamo da bismo zaboravili.
02:02
There are about 10,000 trillion neural connections
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Postoji oko 10,000 triliona nervnih veza
02:05
within the architecture of your brain.
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u arhitekturi vašeg mozga.
02:07
They are created by everything you think and everything you do.
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One nastaju od svega o čemu razmišljamo i svega što radimo.
02:11
A 1983 neurobiological theory of dreaming, called reverse learning,
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Neurobiološka teorija o snovima iz 1983, nazvana obrnuto učenje,
02:15
holds that while sleeping, and mainly during REM sleep cycles,
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tvrdi da dok spavamo, a uglavnom tokom REM ciklusa spavanja,
02:19
your neocortex reviews these neural connections
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vaš neokorteks pregleda ove nervne veze
02:22
and dumps the unnecessary ones.
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i odbacuje one koje su suvišne.
02:25
Without this unlearning process,
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Bez ovog procesa odučavanja,
02:27
which results in your dreams,
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koji proishodi u vašim snovima,
02:28
your brain could be overrun by useless connections
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vaš mozak bi mogao da bude preplavljen beskorisnim vezama
02:31
and parasitic thoughts could disrupt the necessary thinking
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i parazitske misli bi mogle da ometu nužno razmišljanje
02:34
you need to do while you're awake.
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koje vam je neophodno dok ste budni.
02:37
We dream to keep our brains working.
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Sanjamo da bismo očuvali rad mozga.
02:42
The continual activation theory proposes that your dreams result
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Teorija o trajnoj aktivaciji pretpostavlja da vaši snovi proishode
02:46
from your brain's need to constantly consolidate and create long-term memories
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iz potrebe vašeg mozga da stalno učvršćuje i stvara dugoročna pamćenja
02:51
in order to function properly.
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kako bi radio kako treba.
02:53
So when external input falls below a certain level,
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Dakle, kada uticaj spolja padne ispod određenog nivoa,
02:55
like when you're asleep,
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kao kad spavate,
02:57
your brain automatically triggers
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vaš mozak automatski pokreće
02:58
the generation of data from its memory storages,
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proizvodnju podataka iz memorijskih skladišta,
03:01
which appear to you in the form of the thoughts and feelings
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koji vam se prikazuju u vidu misli i osećanja
03:04
you experience in your dreams.
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koje doživljavate u svojim snovima.
03:06
In other words,
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Drugim rečima,
03:07
your dreams might be a random screen saver your brain turns on
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vaši snovi bi mogli da budu nasumični skrin sejver koji vaš mozak uključuje
03:10
so it doesn't completely shut down.
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kako se ne bi potpuno isključio.
03:14
We dream to rehearse.
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Sanjamo da bismo vežbali.
03:18
Dreams involving dangerous and threatening situations are very common,
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Prilično su česti snovi o opasnim i pretećim situacijama,
03:21
and the primitive instinct rehearsal theory
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a teorija o vežbanju primitivnih instikata
03:24
holds that the content of a dream is significant to its purpose.
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tvrdi da sadržaj sna ima važnu svrsishodnost.
03:27
Whether it's an anxiety-filled night of being chased through the woods by a bear
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Bilo da se radi o nespokojnoj noći u kojoj vas medved juri kroz šumu
03:31
or fighting off a ninja in a dark alley,
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ili o sukobu s nindžom u mračnoj ulici,
03:34
these dreams allow you to practice your fight or flight instincts
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ovi snovi vam omogućuju da vežbate svoje instinkte za borbu i beg
03:37
and keep them sharp and dependable in case you'll need them in real life.
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i da ih održavate izoštrenim i pouzdanim u slučaju da vam zatrebaju u stvarnosti.
03:41
But it doesn't always have to be unpleasant.
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No, snovi ne moraju uvek da budu neprijatni.
03:43
For instance, dreams about your attractive neighbor
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Na primer, snovi o vašem zgodnom komšiji
03:46
could actually give your reproductive instinct some practice, too.
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mogu takođe da uvežbavaju vaš reproduktivni instinkt.
03:50
We dream to heal.
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Sanjamo da bismo se izlečili.
03:54
Stress neurotransmitters in the brain are much less active
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Neurotransmiteri stresa u mozgu su daleko manje aktivni
03:57
during the REM stage of sleep,
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tokom REM faze sna,
03:59
even during dreams of traumatic experiences,
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čak i tokom snova o traumatičnim iskustvima,
04:02
leading some researchers to theorize
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zato neki istraživači imaju teoriju
04:04
that one purpose of dreaming is to take the edge off painful experiences
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da je jedna od svrha snova da ublaže bolna iskustva,
04:08
to allow for psychological healing.
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da omoguće psihološko iscelenje.
04:10
Reviewing traumatic events in your dreams with less mental stress
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Revizija traumatičnih događaja u snovima, uz manje mentalnog stresa,
04:13
may grant you a clearer perspective
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može da vam obezbedi jasniji pogled
04:16
and enhanced ability to process them in psychologically healthy ways.
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i veću sposobnost njihove obrade na psihološki zdravije načine.
04:20
People with certain mood disorders and PTSD often have difficulty sleeping,
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Ljudi s nekim poremećajima raspoloženja i PTSP, često imaju problema sa snom,
04:25
leading some scientists to believe that lack of dreaming
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zbog čega neki naučnici veruju da bi nedostatak sna
04:28
may be a contributing factor to their illnesses.
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mogao da bude dodatni razlog za njihove bolesti.
04:32
We dream to solve problems.
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Sanjamo da bismo rešavali probeleme.
04:37
Unconstrained by reality and the rules of conventional logic,
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Bez stega stvarnosti i pravila konvencionalne logike,
04:40
in your dreams, your mind can create limitless scenarios
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u vašim snovima, vaš mozak može da stvara bezgranična scenarija
04:43
to help you grasp problems
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kako bi vam pomogao u shvatanju problema
04:45
and formulate solutions that you may not consider while awake.
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i u osmišljanju rešenja koja ne biste razmatrali budni.
04:49
John Steinbeck called it the committee of sleep,
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Džon Stajnbek je to zvao komitetom iz snova,
04:51
and research has demonstrated
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a istraživač je pokazao
04:53
the effectiveness of dreaming on problem solving.
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učinkovitost snova u rešavanju problema.
04:56
It's also how renowned chemist August Kekule
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Na taj način je i renomirani hemičar Avgust Kekule
04:58
discovered the structure of the benzene molecule,
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otkrio strukturu molekula benzena
05:01
and it's the reason that sometimes the best solution for a problem
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i to je razlog zašto je ponekad najbolje rešenje za problem
05:05
is to sleep on it.
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da ga pustite da odleži.
05:06
And those are just a few of the more prominent theories.
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A ovo su samo neke od istaknutijih teorija.
05:10
As technology increases our capability for understanding the brain,
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Kako tehnologija uvećava našu sposobnost razumevanja mozga,
05:13
it's possible that one day
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moguće je da ćemo jednog dana
05:15
we will discover the definitive reason for them.
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otkriti nedvosmislen razlog za njih.
05:18
But until that time arrives, we'll just have to keep on dreaming.
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No dok to vreme stigne, moraćemo prosto da nastavimo da sanjamo.

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