Andrew Huberman· PhD
noradrenaline and serotonin they are both shut off so the stress related chemical within the brain is Switched Off during REM sleep however if you look at other parts of the brain the memory related centers of the brain such as the hippocampus that we've spoken about before and the amydala that I just mentioned too those are very active during REM sleep so we laid out this biological model that is almost beautiful that REM sleep is this perfect condition for emotional overnight therapy where you can re activate and re sort of experience and reprocess those emotional memories but you're doing it in a neurochemically quote unquote safe environment that allows you to strip away the emotion from the memory