Body Atlas

Memory and Learning · Brain

Does sleep really help memory?

Memories are consolidated overnight, not during the day.

The simple answer

The work of turning today into memory largely happens tonight. During sleep your brain replays the day's activity and strengthens what's worth keeping — which is why an all-nighter before an exam is close to self-sabotage.

Go deeper

There's more: memories are consolidated overnight, not during the day. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.

Explore this concept in Body Atlas →

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