Deep sleep has been quite difficult to get high levels of accuracy on. Rem sleep is typically an easier state to identify. When you go into rem sleep, which is the principal state within which you dream, your brain paralyzes your body. It's especially a lot easier to kind of gay jum like ya.
Matt Walker chats with Kevin about the latest sleep science and hacks. Matt is a Professor of Neuroscience and Psychology at the University of California, Berkeley. He is also the founder and director of the Center for Human Sleep Science.
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