3 ms·So the brain is less alert to outside noise during sleep. This is news?by CGMthrowaway 2mo agoSo the brain is less alert to outside noise during sleep. This is news?tiahura 2mo agoWouldn’t the intuition be the opposite? Ie, listen to environment more carefully while your eyes are closed and laying down so you don’t get eaten by a predator?laxpri 2mo agoduring sleep ? what are you talkingNDlurker 2mo agoHave you never slept before?