Rhonda Patrick· PhD
what seems to be happening in between deep sleep and REM sleep there's a really really interesting dichotomy where they're both important for for different reasons where one of the things the main thing that seems to be happening in the deep sleep is synaptic pruning and synaptic homeostasis. So what and and in REM sleep there's a lot of synaptic strengthening and connection building and those two things work in concert with each other.