When does rem sleep occur

You've probably heard of REM sleep — otherwise known as rapid eye movement sleep — at some point while troubleshooting your bedtime routine.

If it sounds serious, that's because it is; it's a crucial period of the night where your heart quickens, breathing increases, and yes, your eyes flutter around rapidly.

How much core sleep do you need

It's likely when you have your most life-like dreams, but more importantly, sleep specialists have years of data that suggests REM sleep is when your brain stores short-term memories from days prior into your long-term bank. Research also shows that REM sleep is tied to your cognitive health, including learning abilities and mood regulation, among other abilities.

You'd probably guess that the more REM sleep you enjoy, the sharper your brain will be, right? Sadly, it's not as simple as that. Your body needs to get through most of the night before it enjoys a cognitive boost in a REM sleep period.

REM is usually the last long period of sleep after three other stages that are part of a perfect nigh

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