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B1 Intermédiaire Anglais 6:32 Educational

Why Do We Dream?

Vsauce · 11,248,746 vues · Ajouté il y a 3 semaines

Statistiques d apprentissage

B1

Niveau CECRL

5/10

Difficulté

Sous-titres (122 segments)

00:00

Hey, Vsauce. Michael here. And today we are going to talk about why we dream.

00:05

What's going on inside our brains?

00:07

The scientific study of dreaming is called oneriology.

00:11

And for most of history, it didn't really exist,

00:14

because you can't hold a dream.

00:16

It's difficult to measure a dream, you can't taste it.

00:19

You can't see other people's dreams,

00:22

and if you ask them to tell you what they dreamt,

00:24

the results are almost always unreliable.

00:27

In fact, it's estimated that we forget 85 percent

00:31

of the dreams we have, especially within the first ten minutes of having them.

00:35

But then, in 1952, something amazing happened.

00:39

Researchers at the University of Chicago found this.

00:43

It's a unique type of electrical activity

00:46

that occurs during a certain stage of a person sleeping.

00:50

When researchers awoke people during this stage,

00:53

they almost always reported that they had been dreaming.

00:56

Also, at the same time, during this stage, people's eyeballs are going crazy,

01:01

rapidly darting all over the place underneath their eyelids.

01:04

You can actually see this happening if you watch people sleep like I usually do.

01:07

During REM sleep, some pretty bizarre stuff happens.

01:10

If you look at the electrical activity of a brain

01:13

that is in REM sleep, it almost exactly mimics

01:16

the way the brain acts when it's awake.

01:18

The biggest difference being that the production of chemicals inside the brain

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