It’s incredible to think that the neurons in our brains are almost as active when we’re asleep as when we’re awake! Each night, the brain moves through five recurring sleep cycles of between 90 and 110 minutes.
Within each cycle there are specific sleep stages and electrical patterns of brain waves called Alpha, Theta and Delta.
While you’re sleeping your brain cycles repeatedly between two different types of sleep: REM (rapid-eye movement) sleep and non-REM sleep.
REM is the type of sleep you get when you first nod off. During this time, you’re breathing rapidly, moving our eyes a lot, and our muscles are temporarily paralysed. You’re half conscious, half asleep.
Non-REM sleep is when we’re snoozing soundly. It can be divided into light sleep, true sleep and deep sleep.
Who knew there was so much going on after lights out!