10+ hours of podcasts, in 5 minutes.
8 quotes from 1 episode on Huberman Lab, each with a timestamped link to the source.
Gina Poe states that specific sleep phases physically clean cellular waste and sort daily memories. Going to bed at 1 AM forces the brain to skip the slow wave cycle that washes out misfolded proteins.
Divorcing facts from raw emotion requires a complete halt of norepinephrine in the brain.
“And I think the key to that again is the absence of norepinephrine…”
A failure to downscale the norepinephrine system during REM sleep prevents the brain from separating factual memories from emotional trauma.
“So that's what we're thinking is that the emotional parts are not able to be divorced because the norphan system is not downscaled during REM sleep…”
Firing neurons expand their membranes during wakefulness. This constant activity leaves behind misfolded proteins and cellular debris that the brain clears out during sleep.
“What happens when a neuron is firing is that it expands. The membrane expands a little bit. It becomes more translucent.”
“We're cleaning out all those misfolded proteins, unfolded proteins, and other things that get broken down and need to be rebuilt when we're asleep because of its use during wakefulness.”
Falling asleep at 1 or 2 in the morning pushes the brain directly into N2 and REM stages. The brain misses the synchronized firing and silence that flushes out biological debris.
“If you go to sleep at 1 or 2 in the morning, your sleep is still going to be dominated by N2 and REM sleep, not by slow wave sleep…”
“The reason why you can measure them is that all the neurons at the same time, not all of them, but a good portion of them are firing at the same time and silent at the same time…”
The locus coeruleus shuts off completely during REM sleep, halting the flow of norepinephrine. This quiet state allows the brain to erase useless synapses and write daily data from a temporary drive into the long-term cortex.
“And then when we go into REM sleep it's the only time when it shuts off completely and it appears that that complete silence is really really important for a number of things and the main thing that I think it's important for is the ability to erase and break down synapses that are no longer working for us.”
“So that thumb drive is what you carry around all day long and then during sleep you write that thumb drive to the cortex to the long-term memory structures and you need to refresh that thumb drive and that's what happens during REM sleep when the locus realis is off…”
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