The terrors of sleep paralysis - Ami Angelowicz
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0:07 - 0:09Imagine this:
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0:09 - 0:10You're fast asleep
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0:10 - 0:13when all of a sudden you're awoken!
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0:13 - 0:14And not by your alarm clock.
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0:14 - 0:16Your eyes open,
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0:16 - 0:18and there's a demon sitting on your chest,
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0:18 - 0:19pinning you down.
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0:19 - 0:21You try to open your mouth and scream,
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0:21 - 0:23but no sound comes out.
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0:23 - 0:24You try to get up and run away,
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0:24 - 0:27but you realize that you
are completely immobilized. -
0:27 - 0:30The demon is trying to suffocate you,
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0:30 - 0:31but you can't fight back.
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0:32 - 0:34You've awoken into your dream,
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0:34 - 0:36and it's a nightmare.
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0:36 - 0:38It sounds like a Stephen King movie,
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0:38 - 0:40but it's actually a medical condition
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0:40 - 0:42called sleep paralysis,
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0:42 - 0:43and about half of the population
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0:43 - 0:45has experienced this strange phenomenon
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0:45 - 0:47at least once in their life.
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0:47 - 0:49This panic-inducing episode
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0:49 - 0:51of coming face-to-face with the creatures
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0:51 - 0:52from your nightmares
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0:52 - 0:54can last anywhere from seconds to minutes
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0:54 - 0:57and may involve visual
or auditory hallucinations -
0:57 - 0:59of an evil spirit
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0:59 - 1:02or an out-of-body feeling
like you're floating. -
1:02 - 1:04Some have even mistaken sleep paralysis
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1:04 - 1:06for an encounter with a ghost
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1:06 - 1:08or an alien abduction.
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1:08 - 1:12In 1867, Dr. Silas Weir Mitchell
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1:12 - 1:13was the first medical professional
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1:13 - 1:16to study sleep paralysis.
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1:16 - 1:18"The subject awakes to consciousness
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1:18 - 1:19of his environment
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1:19 - 1:22but is incapable of moving a muscle.
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1:22 - 1:25Lying to all appearance, still asleep.
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1:25 - 1:28He's really engaged
for a struggle for movement, -
1:28 - 1:30fraught with acute mental distress.
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1:30 - 1:32Could he but manage to stir,
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1:32 - 1:35the spell would vanish instantly."
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1:35 - 1:36Even though Dr. Mitchell was the first
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1:36 - 1:39to observe patients in a state
of sleep paralysis, -
1:39 - 1:41it's so common that nearly every culture
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1:41 - 1:43throughout time has had some kind
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1:43 - 1:45of paranormal explanation for it.
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1:45 - 1:48In medieval Europe, you might
think that an incubus, -
1:48 - 1:51a sex-hungry demon in male form,
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1:51 - 1:52visited you in the night.
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1:52 - 1:55In Scandinavia, the mare,
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1:55 - 1:56a damned woman,
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1:56 - 1:58is responsible for visiting sleepers
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1:58 - 2:00and sitting on their rib cages.
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2:00 - 2:03In Turkey, a jinn holds you down
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2:03 - 2:05and tries to strangle you.
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2:05 - 2:08In Thailand, Phi Am bruises
you while you sleep. -
2:08 - 2:10In the southern United States,
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2:10 - 2:12the hag comes for you.
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2:12 - 2:13In Mexico, you could blame
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2:13 - 2:17subirse el muerto,
the dead person, on you. -
2:17 - 2:19In Greece, Mora sits upon your chest
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2:19 - 2:21and tries to asphyxiate you.
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2:21 - 2:23In Nepal, Khyaak the ghost
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2:23 - 2:25resides under the staircase.
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2:25 - 2:27It may be easier to blame
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2:27 - 2:29sleep paralysis on evil spirits
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2:29 - 2:31because what's actually
happening in your brain -
2:31 - 2:33is much harder to explain.
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2:33 - 2:35Modern scientists believe
that sleep paralysis -
2:35 - 2:37is caused by an abnormal overlap
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2:37 - 2:39of the REM, rapid eye movement,
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2:39 - 2:41and waking stages of sleep.
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2:41 - 2:43During a normal REM cycle,
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2:43 - 2:46you're experiencing
a number of sensory stimuli -
2:46 - 2:47in the form of a dream,
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2:47 - 2:50and your brain is unconscious
and fully asleep. -
2:50 - 2:51During your dream,
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2:51 - 2:54special neurotransmitters are released,
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2:54 - 2:56which paralyze almost all of your muscles.
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2:56 - 2:58That's called REM atonia.
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2:58 - 3:00It's what keeps you
from running in your bed -
3:00 - 3:02when you're being chased in your dreams.
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3:02 - 3:05During an episode of sleep paralysis,
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3:05 - 3:08you're experiencing
normal components of REM. -
3:08 - 3:10You're dreaming and your muscles
are paralyzed, -
3:10 - 3:13only your brain is conscious
and wide awake. -
3:13 - 3:14This is what causes you to imagine
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3:14 - 3:16that you're having an encounter
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3:16 - 3:17with a menacing presence.
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3:17 - 3:20So this explains the hallucinations,
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3:20 - 3:22but what about the feelings of panic,
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3:22 - 3:23strangling,
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3:23 - 3:23choking,
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3:23 - 3:24chest pressure
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3:24 - 3:26that so many people describe?
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3:27 - 3:28Well during REM,
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3:28 - 3:29the function that keeps you
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3:29 - 3:31from acting out your dreams,
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3:31 - 3:32REM atonia,
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3:32 - 3:34also removes voluntary control
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3:34 - 3:35of your breathing.
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3:35 - 3:37Your breath becomes more shallow
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3:37 - 3:38and rapid.
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3:38 - 3:39You take in more carbon dioxide
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3:39 - 3:42and experience a small
blockage of your airway. -
3:42 - 3:45During a sleep paralysis episode,
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3:45 - 3:47a combination of your body's fear response
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3:47 - 3:49to a perceived attack by an evil creature
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3:49 - 3:51and your brain being wide awake
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3:51 - 3:53while your body is in an REM sleep state
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3:53 - 3:56triggers a response for you
to take in more oxygen. -
3:56 - 3:58That makes you gasp
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3:58 - 3:59for air,
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3:59 - 4:00but you can't
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4:00 - 4:01because REM atonia
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4:01 - 4:04has removed control of your breath.
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4:04 - 4:06This struggle for air
while your body sleeps -
4:06 - 4:07creates a perceived sensation
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4:07 - 4:09of pressure on the chest
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4:09 - 4:11or suffocation.
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4:11 - 4:12While a few people experience
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4:12 - 4:14sleep paralysis regularly
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4:14 - 4:16and it may be linked to sleep disorders
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4:16 - 4:17such as narcolepsy,
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4:17 - 4:20many who experience
an episode of sleep paralysis -
4:20 - 4:21do so infrequently,
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4:21 - 4:24perhaps only once in a lifetime.
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4:24 - 4:25So you can rest easy,
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4:25 - 4:27knowing that an evil entity is not trying
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4:27 - 4:28to haunt,
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4:28 - 4:28possess,
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4:28 - 4:29strangle,
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4:29 - 4:30or suffocate you.
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4:30 - 4:33Save that for the horror films!
- Title:
- The terrors of sleep paralysis - Ami Angelowicz
- Speaker:
- Ami Angelowicz
- Description:
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View full lesson: http://ed.ted.com/lessons/the-terrors-of-sleep-paralysis-ami-angelowicz
Imagine you're fast asleep and then suddenly awake. You want to move but can't, as if someone is sitting on your chest. And you can't even scream! This is sleep paralysis, a creepy but common phenomenon caused by an overlap in REM sleep and waking stages. Ami Angelowicz describes just how pervasive (but harmless) it is and introduces a cast of characters from sleep paralysis around the world.
Lesson by Ami Angelowicz, animation by Pew36 Animation Studios.
- Video Language:
- English
- Team:
- closed TED
- Project:
- TED-Ed
- Duration:
- 04:49
Jessica Ruby edited English subtitles for The terrors of sleep paralysis | ||
Krystian Aparta edited English subtitles for The terrors of sleep paralysis | ||
Jessica Ruby approved English subtitles for The terrors of sleep paralysis | ||
Jessica Ruby accepted English subtitles for The terrors of sleep paralysis | ||
Jessica Ruby edited English subtitles for The terrors of sleep paralysis | ||
Jessica Ruby edited English subtitles for The terrors of sleep paralysis | ||
Andrea McDonough edited English subtitles for The terrors of sleep paralysis |