Ooo, first comment. Either way I'll take this opportunity to explain what this picture means. I believe what happens is that your body relaxes a bit too quickly and your blood pressure drops dangerously fast (as in you could legit die) so as a way to combat this, your body gives you a quick shot of adrenalin to wake you up and raise your blood pressure.
@beastman21, I thought it was just another symptom of exploding head syndrome, which I guess could very well be caused by your science-y things.
@beastman21, Just want to make sure you understand, make sure to never mention being first to a pic or having first comment, people hate it... But since you explained the science, I think you're okay...
@beastman21, No that is wrong. Right when you are about to sleep the boogie man comes in to steal you away. Your body senses this before your brain does and twitches violently, releasing a deadly toxin to the boogie man spiecies(and also wizards) melting them on the spot. Stop comlpaining and thank your body.
@Super GingerBoy, haha, I've been on this app for a long time :P knew it would bother people but the explanation would make up for it haha
@SneakyPeaky, no you are actually just feeling a disturbance in the Force.
@Star Wars Qoutes , And that's when I jerk
@beastman21, Hypnagogic jerk, or Hypnic jerk. It's a random spasm and it's not actually confirmed what causes it but there are sever theories, a lot of people say when it happens they jump up with this falling sensation, so there's a theory that your brain actually panics thinking you are in danger and wakes you up. But the picture supports another theory that says that during the hypnagogic state, as your body slows down to sleep that the brain miss reads this as your body shutting down completely so it shakes you awake to help you fight to stay alive.
@LT PUNK ROCKET, that's what I've heard. It's a side effect of entering REM sleep, and sometimes the brain doesn't know how to react and freaks out. Kind of the opposite of what can happen to people with sleep apnea. They begin to have trouble breathing, possibly even stop, and the brain doesn't realize this so it never wakes them up to correct the problem
@beastman21, it's none of the other comments. Your brain emits a chemical just as you enter sleep, to prevent you from injuring yourself by "acting out" your dreams. Sleepwalking is when that chemical hasn't been effective enough to block the messages to your limbs. If you have ever seen a dog asleep on its side, thrashing about while dreaming of chasing a cat or whatever, you'll know how much damage could be caused by "acting out" dreams..
@LT PUNK ROCKET, yeah I've experienced these before. One of the most terrifying sensations I've ever had. Makes it hard to fall asleep the night because it feels like it might happen again.
@TheMightyImp, that's another applied theory to Hypnic jerk. You can look it up if you don't believe, but the only reason I know is because it happened to me 2 nights in a row a few years ago and I researched it because I was afraid it was a serious issue due to it occurring more than once in order. It's more common when you go to sleep during a period of anxiety or high stress.
@Super GingerBoy, he shall be pardoned this one time ( at least that's what my vote is)
@beastman21, I always get a boner when that happens.
@J Suma, No that's completely different
@beastman21, Wrong. It only happens when the different parts of your brain start falling asleep at different times instead of at the same time, so you're momentarily aware of the falling sensation that always occurs before you fall asleep, involuntarily startling you awake.
@beastman21, it's called a hynogogic jerk, which occurs when your sympathetic nervous system believes you're falling for some reason, which prompts it to wake you up immediately, a remnant of our primate origins.
@beastman21, it's is actually your muscles becoming too relaxed and your brain telling them to tense up again. Just learned this in college.
@beastman21, I thought that was caused by my Tourette's ...
@RobotFrog21, mine is mild so no I do not yell swears just emit weird sounds and get ticks
@beastman21, This body movement is what doctors and scientists call a hypnic (or hypnagogic) or myoclonic jerk. It's also known as a "sleep start," and it can literally startle you out of falling asleep.
This type of feeling is normal, and it can happen before people enter the deeper stages of sleep. Doctors and scientists aren't really sure why our bodies do this, but they have a few theories.
One theory is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to "catch yourself" before falling down — and that makes your body jerk.
These body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.
I violently jerk my body before i sleep too
@Rupaul, I read that as "I as violently jerk before I sleep."
@Little Black Girl, #thatsthejoke
I have nightmares or missing a puck as well as showing up late to updates
@Jonathan Quick, or making grammatical errors.....I meant *of missing
Hypnagogic jerk is what it is called. It is what your body does to relax your muscles before sleep. A quick bit of tension, then the muscles are loose, and ready for REM paralyses!