Our natural sleep cycle | Jessa Gamble

Translator: David J. Kreps Finnemann Reviewer: Line Hansen

Let's start with day and night.

Lad os begynde med dag og nat.

Life evolved under conditions

Livet udviklede sig under omstændigheder

of light and darkness,

af lys og mørke,

light and then darkness.

lys og så mørke.

And so plants and animals

Så planter og dyr

developed their own internal clocks

udviklede deres egen interne ur

so that they would be ready for these changes in light.

så de kunne være klar for ændringer i lyset.

These are chemical clocks,

Dette er kemiske ure,

and they're found in every known being that has two or more cells

og de findes i hver kendt væsen der har to eller flere celler

and in some that only have one cell.

og i nogle der kun har en celle.

I'll give you an example --

Jeg vil give jer et eksempel --

if you take a horseshoe crab off the beach,

hvis man tager en dolkehale fra stranden,

and you fly it all the way across the continent,

og man flyver den tværs over kontinentet,

and you drop it into a sloped cage,

og man sætter den i et skrånende bur,

it will scramble up the floor of the cage

vil den kravle op ad gulvet af buret

as the tide is rising

som tidevandet stiger

on its home shores,

på dens hjemmekyst,

and it'll skitter down again right as the water is receding

og den vil kravle ned igen som vandet trækker sig tilbage

thousands of miles away.

tusindevis af kilometer væk.

It'll do this for weeks,

Det vil den gøre i flere uger,

until it kind of gradually loses the plot.

indtil den gradvist vænner sig til omstændighederne.

And it's incredible to watch,

Og det er utroligt at se på,

but there's nothing psychic or paranormal going on;

men der foregår ikke noget synsk eller overnaturligt;

it's simply that these crabs have internal cycles

det er simpelthen det at disse krabber har interne cyklusser

that correspond, usually, with what's going on around it.

der passer sammen, sædvanligvis, med det der sker omkring dem.

So, we have this ability as well.

Så, vi har også denne evne.

And in humans, we call it the "body clock."

Og i mennesker, kalder vi det "kroppens ur."

You can see this most clearly when you take away someone's watch

Man kan set det mest tydeligt når man tager nogens ur fra dem

and you shut them into a bunker, deep underground,

og man lukker dem inde i en bunker, dybt under jorden,

for a couple of months. (Laughter)

i et par måneder. (Latter)

People actually volunteer for this,

Mennesker melder sig faktisk frivilligt til dette,

and they usually come out

og de kommer typisk ud

kind of raving about their productive time in the hole.

og taler i vildelse om deres produktive tid i hullet.

So, no matter how atypical these subjects would have to be,

Så, uanset hvor atypiske disse testpersoner måtte være,

they all show the same thing.

viser de alle den samme ting.

They get up just a little bit later every day -- say 15 minutes or so --

De står lidt senere op hver dag -- cirka 15 minutter --

and they kind of drift all the way around the clock like this

og de driver rundt på denne måde døgnet rundt

over the course of the weeks.

i løbet af ugerne.

And so, in this way we know that they are working on their own internal clocks,

Så, på denne måde ved vi at de arbejder ifølge deres egne interne ure,

rather than somehow sensing the day outside.

i stedet for, på en måde, at fornemme dagen udenfor.

So fine, we have a body clock,

Så okay, vi har et ur i kroppen,

and it turns out that it's incredibly important in our lives.

og det viser sig at det er utrolig vigtigt for vores liv.

It's a huge driver for culture

Det er en kæmpe drivkraft i kulturen

and I think that it's the most underrated force on our behavior.

og jeg mener det er den mest undervurdere kraft i vores adfærd.

We evolved as a species near the equator,

Vi har udviklet os som art nær ækvator,

and so we're very well-equipped

så vi er meget godt rustet

to deal with 12 hours of daylight

til at håndtere 12 timers dagslys

and 12 hours of darkness.

og 12 timers mørke.

But of course, we've spread to every corner of the globe

Men selvfølgelig, vi har spredt os til alle jordens hjørner

and in Arctic Canada, where I live,

og i Arktisk Canada, hvor jeg bor,

we have perpetual daylight in summer

har vi evig dagslys om sommeren

and 24 hours of darkness in winter.

og 24 timers mørke om vinteren.

So the culture, the northern aboriginal culture,

Så kulturen, den nordlige aboriginal kultur,

traditionally has been highly seasonal.

har traditionelt set været utrolig sæsonpræget.

In winter, there's a lot of sleeping going on;

Om vinteren, bliver der sovet meget;

you enjoy your family life inside.

man nyder familielivet indenfor.

And in summer, it's almost manic hunting

Og om sommeren, er det næsten manisk jagt

and working activity very long hours,

og man arbejder mange timer,

very active.

meget aktivt.

So, what would our natural rhythm look like?

Så, hvordan ville vores naturlige rytme se ud?

What would our sleeping patterns be

Hvordan ville vores søvnmønster være

in the sort of ideal sense?

i den ideelle form?

Well, it turns out

Jamen, det viser sig

that when people are living

at når mennesker bor

without any sort of artificial light at all,

uden nogen form for kunstigt lys overhovedet,

they sleep twice every night.

sover de to gange hver nat.

They go to bed around 8:00 p.m.

De går i seng ved 20 tiden,

until midnight

indtil midnat

and then again, they sleep

og igen, de sover

from about 2:00 a.m. until sunrise.

fra cirka 2 tiden til solopgang.

And in-between, they have a couple of hours

Og i mellemtiden, har de et par timer

of sort of meditative quiet in bed.

med en form for meditativ stilhed i sengen.

And during this time,

Og i denne tid,

there's a surge of prolactin,

er der en bølge af prolactin,

the likes of which a modern day never sees.

hvis lige ikke bliver set i den moderne tid.

The people in these studies

Personerne i disse studier

report feeling so awake during the daytime,

udtaler at de føler sig så vågne i dagtimerne,

that they realize

at de bliver klar over

they're experiencing true wakefulness

at de oplever ægte vagtsomhed

for the first time in their lives.

for første gang i deres liv.

So, cut to the modern day.

Så, se på nutiden.

We're living in a culture of jet lag,

Vi lever i en kultur af jetlag,

global travel,

global rejsen,

24-hour business,

24 timers virksomheder,

shift work.

skiftearbejde.

And you know, our modern ways

Og I ved, vores moderne skikke

of doing things

med at gøre tingene

have their advantages,

har deres fordele,

but I believe we should understand the costs.

men jeg mener vi bør forstå omkostningerne.

Thank you.

Tak.

(Applause)

(Bifald)