Rhonda Patrick· PhD
REM sleep a lot of people have heard of now um is weird. REM sleep is just fundamentally weird. So like this is where dreams and nightmares happen. Peak blood flow in the brain is actually REM sleep. Like the your brain is extremely active. It's actually more like waking than many any other sleep stage. Um but the waves are very different from waking brain waves. But it is it is more more like that than than um than other stages of sleep. You're also your arousal threshold is different in that it's easier to wake up out of REM sleep, but there's also a couple of other weird things that happen that you're paralyzed. You're so so if in deep in the deep sleep your muscles were very relaxed, that's nothing compared to how mus relaxed your muscles are in REM sleep. not because they're recovering, but because you're actively paralyzed. Uh your alpha motor neurons are hyperpolarized. You cannot move. Uh even if you wanted to. That's because otherwise you'd be acting out your dreams because you think they're real at the time.