Sleep & Your Brain

What happens while you're asleep

Sleep isn't downtime. It's the most cognitively productive stretch of your day. While you sleep, your brain consolidates what you learned, clears out metabolic waste (including proteins linked to Alzheimer's), and resets the emotional circuitry that helps you stay regulated the next day. Even one night of poor sleep measurably impairs memory formation, attention, and decision-making. You often won't notice it in yourself, though the people around you will.