There is so much when it comes to sleep. I don’t think I even need to state how important it is (it affects basically everything in our lives). Why not learn more about it?
Stages 1-3 are considered non-rapid eye movement sleep. These function as you might imagine it. As we progress through the stages our bodies and minds are slowing down, relaxing more and more, and getting deeper into sleep where it is harder to wake up.
Stage 4 is rapid eye movement sleep where our eyes are literally moving around. Our brains are much more active during this period, but our bodies are completely shut off. During this time we tend to have about 80% of our dreams likely because of how active our brains are.
Once we reach stage 4, we go back up through stage 3, 2, and 1 and then cycle back down again. More info throughout the week!
Citation: Chokroverty, S. (2010). Overview of sleep & sleep disorders. Indian Journal of Medical Research, 131(2), 126-140. PMID: 20308738.