Body Atlas

Healthy Brain Habits · Brain

What actually happens in a concussion?

Head injury is one of the few brain risks you can directly prevent.

The simple answer

Most brain-health advice is indirect — sleep better, move more. This one is blunt: your brain is soft tissue suspended in fluid, and a hard enough impact makes it strike the inside of your skull.

Go deeper

There's more: head injury is one of the few brain risks you can directly prevent. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.

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