yea, why?

So the brain can process the day's input and form new neuron connections.

so it has to switch off the power to work on the wires?

Also your muscles need time to relax.
They can't be active 24/7.
Force yourself to stay up for a few days and you'll understand it better.

hmmm so maybe the buildup of some chemicals in your body?

or perhaps its an automatic evolutionary mechanism designed to save energy while the sun is down (like mini hibernation?

you could just google it in 15 seconds instead of wasting time making theories for an answer we alrdy have

vouch and dont try trust me not worth it

This and, your brain also releases chemicals while it it is in its normal sleep pattern. Unfortunately chemicals are still released even if you are awake which can make you go pretty crazy if you stay up long enough. I start hallucinating after 72hrs. Why we release these chemicals is probably to relax your muscles in your body.

This post was edited by Jazz_Thing on Mar 5 2009 10:27pm

this. without it youre neurons start regenerating and the brain shuts off lobe by lobe

This post was edited by Kamikizzle on Mar 5 2009 11:14pm

growth and regeneration