[jacobolus]

I essentially always find it more useful to do a Google Scholar search and skim a highly cited paper vs. asking an LLM.

A search for `"critical regime" brain` turns up as result #2 https://www.frontiersin.org/journals/physiology/articles/10....

> Relatively recent work has reported that networks of neurons can produce avalanches of activity whose sizes follow a power law distribution. This suggests that these networks may be operating near a critical point, poised between a phase where activity rapidly dies out and a phase where activity is amplified over time. The hypothesis that the electrical activity of neural networks in the brain is critical is potentially important, as many simulations suggest that information processing functions would be optimized at the critical point. This hypothesis, however, is still controversial. Here we will explain the concept of criticality and review the substantial objections to the criticality hypothesis raised by skeptics.

A search for `"critical regime" brain sleep` turns up a review article discussing various studies about criticality in neuroscience, including a section reviewing studies related to sleep, https://www.frontiersin.org/journals/neural-circuits/article...