Not getting enough sleep
won't just make you cranky.
It could kill you.
The United Nations even considers sleep deprivation
a form of torture.
And the longer it lasts, the worse it'll get.
Losing sleep affects people differently,
but generally the effects increase as the hours do.
Just 48 hours without sleep is considered
extreme sleep deprivation,
but you'll probably get weird before then.
After 18 hours with no sleep,
you might feel a little drunk.
Staying awake that long is equivalent
to having a blood alcohol content of 0.05%,
which is what you get with three or four drinks
in the span of two hours.
24 sleepless hours,
that BAC comparison jumps to 0.1%,
higher than the legal driving limit in every state.
You might feel foggy, less alert, or uncoordinated,
almost like you're wearing sleepy beer goggles,
including double or blurry vision.
That's because sleep deprivation slows down
our brain cells' ability to talk to each other.
So if you actually are drinking alcohol,
drowsiness can increase its effects.
And while caffeine could make you feel
more alert for several hours,
it'll only work up to a certain point.
By a day and a half,
this could all get worse and then some.
Your chances of getting sick are higher than usual
because your body can't fight like it normally can,
and around this time, your brain and body get so tired
that you start experiencing microsleeps,
tiny periods of sleep, maybe around 30 seconds,
that you might not even notice.
Definitely annoying and even dangerous
if you're doing something like driving a car.
And then there's the potential for hallucinations.
Visual distortions are most common.
Your water bottle grows to twice its size
or moves around the room.
But you could also experience sensational
or auditory hallucinations,
things like feeling someone who's not there
tap you on the shoulder or hearing your name being called.
Once you hit 48 hours, it's literal torture,
which is why extreme-sleep-deprivation studies
are now prohibited by law in most countries.
Two days without sleep can cause you
to start losing your grip on reality.
Hallucinations worsen,
and you might even undergo depersonalization.
That's the feeling that reality is slipping away,
which may or may not include an out-of-body experience.
Tack on extreme anxiety, irritability, stress, and fatigue,
and it's no wonder the UN doesn't allow
this kind of deprivation.
After 72 hours, you're not gonna be able to think
about anything but hitting the hay.
Forget about doing simple tasks.
Things like getting dressed or finding a snack
could feel overwhelming, partially from fatigue
and partially because your ability to regulate emotions
is basically out the window.
Your hallucinations could get more complex,
creating fully formed images like a person, or a bear,
or maybe a car you shouldn't drive.
And in at least four historical sleep studies,
participants reported shared hallucinations,
namely something called the hat phenomenon,
which is basically a feeling of pressure around your head
as if you're wearing a hat.
All of this opens the door for paranoia,
depression, and delusions.
Which brings us to 96 hours or more with no sleep.
Say bye-bye to reality, folks.
More and worse hallucinations and paranoia
could lead to sleep-deprivation psychosis,
a total snap from the real world.
Historically, women accused of being witches
were kept awake long enough to trigger this psychosis.
Judges considered their visions and ramblings confessions,
leading to the women's convictions.
Now, the fifth day is sometimes called the turning point.
This is the danger zone.
Your mental health takes a sharp decline,
cementing your delusions as your new reality.
Eventually, your brain will stop functioning properly
in a way that could lead to organ failure
and, in rare cases, death.
Luckily, recovering from sleep deprivation
can be as simple as catching up on sleep,
but if you're sleep deprived regularly,
you're looking at long-term effects
like weight gain, acne, headaches,
and high blood pressure, among other things.
And it can take weeks to get back on track.
According to one study,
you need four days to recover
from losing a single hour of sleep.
Try getting to bed early instead of sleeping in late,
or, better yet, avoid the recovery period entirely
by getting seven to eight hours of sleep every night
in the first place.
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