It is a neuro-chemical rollercoaster. From paralyzing your body to washing your brain, explore the 5 mind-bending truths about what happens when you close your eyes.
Start ExploringSleep isn't a flat line. It's a wave. (See the State of Sleep report.) Understanding where you are in the cycle is the key to energy. Explore the napping zones below.
While you are awake, your brain cells are packed tightly together. But during sleep, the glymphatic system kicks in. The space between cells expands by up to 60%, allowing cerebrospinal fluid to rush through and flush out toxins like beta-amyloid. (Learn more about why sleep matters.)
Why don't you physically run when you dream about running? Your brain chemically paralyzes your major muscle groups to keep you safe.
During Rapid Eye Movement (REM) sleep, your brain activity is nearly identical to when you are awake. You are processing emotions and visualizing complex scenarios.
To prevent injury, the brainstem sends inhibitory signals to the spinal cord, inducing Atonia—temporary muscle paralysis.
Did you know? "Sleep Paralysis" is simply your mind waking up before this chemical safety lock has disengaged.
Techniques to wake up while you are asleep.
This technique relies on prospective memory—the intention to do something in the future.
As you fall asleep, repeat: "Next time I'm dreaming, I will remember I'm dreaming."
Imagine yourself becoming lucid in a recent dream you recall.
Do this until you fall asleep. Focus is key.