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Did you know your brain temperature drops when you yawn?

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Full transcript of Did you know your brain temperature drops when you yawn?

Did you know your brain temperature drops when you yawn? It’s true. Scientists think yawning is a built-in cooling system for our brain. Just like a computer fan, a good yawn helps regulate temperature, keeping you alert and focused. When you yawn, you take a deep breath, bringing cool air into your lungs. This air cools the blood flowing to your brain. The stretching of your jaw also increases blood flow to your skull, which further helps dissipate heat. So, a yawn isn't a sign you're tired; it's your brain staying sharp. And if you just yawned while hearing that, you're not alone. Yawning can be incredibly contagious. Seeing someone else yawn, or even just thinking about it, can trigger one yourself. It's a fascinating social reflex, and scientists are still figuring out exactly why it happens. Maybe it's a way for us to synchronize our alertness.

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