today i learned – mon 25th feb 2019

raise your hands if you love sleep 🙋🏻‍♂️🙋🏻‍♂️🙋🏻‍♂️ ever feel like you’ve fallen off a cliff when you’ve just drifted off?

#tdil the reason why you sometimes jolt awake just as you begin to drift off to sleep … you know, that weird sudden jerk when you feel like you’ve fallen.

okay … slight fib … by “learned the reason why” i mean that i’ve learned some theories 🙈 

the jerk is called a ‘hypnic jolt’ and it’s thought to be your brain looking out for you … it’s an evolution thing apparently and there are two main theories as to why it happens. 

the first theory is that the Hypnic jolt was something that developed when we used to sleep in the wild … you know, up trees and stuff. it’s thought that the jolt happened just as we drifted off to sleep as a final test of stability and footing before unconsciousness occurred. that’s a pretty important final check if you’re about to take a nap at the top of a tall tree 😳.

a second theory is that the jerk is caused as your nervous system gives in to the urge to sleep. as this happens, your breathing and heart rate drops, your body temperature lowers, your muscle tone shifts and your muscles twitch. 

it kind of sucks that scientists don’t know the exact reason why the hypnic jerk happens but i feel like (i’ve no idea why) the first one makes total evolutionary sense 🤔 that’s my favourite one, therefore that’s the one i’m going with 😏

another short and sweet one today 👍🏻 interesting nonetheless 😬. at least you now know (kind of) why it happens next time it does or someone mentions it happening 🙃.

night yo! 👻 #tdil 


another fact down! 🙌🏻 how is it nearly march?! 😱 want to read something else? just take a look ->here<-

(images! the header is ->here<- and the other is ->here<-)

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