Yawning cools your brain

This was just too interesting to pass up especially when the outside temperature is well below freezing and I am yawning and longing for a nap.  Evidently the primary purpose of yawning is to cool your brain.  Read more

4 Responses

  1. I prefer to “believe” that you yawn because of a build up of pressure in your head. When you yawn you equalize the pressure in your head with the outside air pressure.

    This is the reason that Yawning is contagious.

    After you yawn your head is equalized to the outside air but the outside air pressure has been changed by your yawn so now everyone around you needs to yawn to equalize their head pressure. ;P

  2. Ben
    I love it – if I yawn the whole world must yawn too.!

  3. Interesting article. I wonder if it’s related to serotonin levels. Often, when a person goes onto SSRI medication, they yawn for about five days (off an on, but for about 5 days total) before stopping. Maybe serotonin heats up the neuroreceptors and the yawning is to cool them down.

    Although I do love the equalization theory. 🙂

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