Yawning? Your Brain May Be Overheated
Tiredness can affect body temperature
By Matt Cantor, Newser User
Posted May 7, 2014 4:13 PM CDT
Yawns may be a way of cooling our brains, researchers suggest.   (Shutterstock)

(Newser) – If you're yawning a lot, check the temperature: Researchers say we may yawn when it's warm out because that cools down the brain. In the study, which agrees with earlier research, experts at the University of Vienna showed pictures of yawns to pedestrians in Austria and Arizona, ScienceDaily reports; they aimed to induce contagious yawning, ninemsn explains. After the study was conducted in both summer and winter, researchers found that such yawns occurred most often at temperatures around 68 degrees Fahrenheit.

The scientists argue that there's a "thermal window for yawning," and it opens when we're warm but the air is cool enough for a yawn to lower our temperatures, Time reports. Previous research has indicated that we yawn after our body temperatures rise. The study found that people's age, sex, and previous night's sleep, on the other hand, didn't have much of an effect on our yawning patterns. All this talk of temperature still fits the idea that we yawn when sleepy, ninemsn notes. Tiredness, stress, and a lack of stimulation can have an effect on our brain temperatures.

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Showing 3 of 6 comments
May 10, 2014 11:59 AM CDT
Yawning blows off carbon dioxide, raises blood oxygen, and helps wake you up. When you are really tired, try and stimulate yawning in private and go for broke.
May 8, 2014 12:58 AM CDT
I enjoy a good full yawn. About as much as a good hard sneeze.
May 8, 2014 12:27 AM CDT
Overheated or baked?