What is the purpose of sleep? It's not like we get energy

>>7645962
it's to prevent you're braine from overeating

>>7645962
We used to not have light at night. Electricity is a recent thing, you know. Our consiousness couldn't function after the sunt went dow, due to the lack stimulae.

Do you think it is possible to invest something that would allow a human to not ever need to sleep?

>>7645962
-Your body is immobile during sleep, and it therefore can switch functionality to a state that promotes rapid healing and waste elimination.
-Your brain has to clear and recycle ADP and cAMP, among other things.
-Brain has to sort information and repeatedly simulate activities you find to be important, which makes you better at them for a longer period. Dendritic spine formation, etc.
-Hormone cycle changes.
-Evolutionarily was probably a waste of energy in most cases. Organisms were better off investing into nesting and denning behaviors.

>>7645962
Gotta shut the machine down to do repairs.

Do you think organisms would have evolved to sleep if we lived in a place with a constant light source? Do organisms without light detection sleep at all?

>>7645995
Up north in some places goes days without sun down and even those animals have to sleep so yes.

>>7646011
You're talking about very modern animals compared to something like sleep which is such an early trait. That's not what I'm talking about.

>>7645995

Creatures in the deep ocean have to sleep too, so yes probably. We'd probably do it in phases though, like only letting one half of the brain sleep at a time.

>what is maintenance requirements
>what is learning and optimally using resources for learning
>what is energy conservation during evolutionary useless hours (night)

File: 11.3.jpg (71KB, 1136x639px) Image search: [Google]

71KB, 1136x639px

>>7645966
a-PVP

It's for cleaning your brain.

This year they discovered that there's a lymphatic system in mammalian brains, and when you sleep, spinal fluid rushes up into the brain's lymphatic vessels and rinses away any cellular debris created during the day.

>>7645964
damn. thats a really believable explanation and kind of depressingn that its totally unnecessary

>>7646628
> thats a really believable explanation

Yeah, it's what's called a just-so story. Take his explanation with a massive grain of salt.

https://en.wikipedia.org/wiki/Just-so_story

>>7645966
It's called meth senpai

>>7646509
I find it amazing that it took this long to discover this. What else have we overlooked for all these years?

>>7646509

Where can I read the paper on this?

>>7645962
your brain removes waste from your neurons when you sleep so they can function at peak efficiency during the day.