Health, Longevity & How the Body Works

Live longer, feel better, what's actually solid

Novice

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Novice

Note. Educational, not medical advice. For symptoms, conditions, or before major lifestyle changes (especially with chronic conditions), talk to a qualified doctor. For emergencies in India, the standard number is 112.

Concept 10 of 20

debated

Sleep architecture

Sleep is not one thing. It is several stages doing different jobs, and skipping any of them shows up the next day.

Definition

The structured pattern of sleep stages, light, deep, and REM, that cycles roughly every 90 minutes through the night.

Step 1

Predict first

In one or two sentences, what do you think this concept means? Wrong is fine; the small struggle is what makes the answer stick.