Sleep: What Is Your Body Doing While You’re Unconscious?
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Sleep: What Is Your Body Doing While You’re Unconscious?
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Every night, consciousness disappears but the body does not simply shut down.
Your brain reorganizes activity. Hormones change. Body temperature falls. Memories are processed. Immune signals shift. Metabolism changes. And throughout the night, the brain repeatedly moves through different stages of sleep.
In Episode 5 of Inside Your Biology, we investigate what sleep actually is, why humans need it, and what happens when we consistently do not get enough.
We explore circadian rhythms, melatonin, adenosine, deep sleep, REM sleep, memory, metabolism, immunity, cardiovascular function, and the biological consequences of sleep deprivation.
Why do we cycle through different sleep stages? Can you “catch up” on lost sleep? Does alcohol really help you sleep? What does your smartwatch actually know about your sleep? And is eight hours truly the magic number for everyone?
The deeper question is:
Why would evolution require us to spend roughly a third of our lives in a state where we are largely disconnected from the outside world?
Inside Your Biology — The science of what’s happening inside you.