I remember listening Rogan's podcast on the subject of sleep with Matthew Walker, who is a professor of Neuroscience at Berkley. Hopefully I'm not making stuff

I remember listening Rogan's podcast on the subject of sleep with Matthew Walker, who is a professor of Neuroscience at Berkley. Hopefully I'm not making stuff up as it's been a while, but he talked about a study where each subject was given a task to learn while their brain activity was being recorded. The study found that the same areas of the brain that flared up during the learning and memorization processes were also very active during sleep, as if the brain was replaying the same activity over and over again. Edit: adding link to the podcast if anyone's interested - https://www.youtube.com/watch?v=pwaWilO_Pig https://www.youtube.com/watch?v=pwaWilO_Pig