facebook
twitter
rss
account
search
search
 

Study: People yawn to cool overheated brains

In the summer, even your brain feels the heat.
By Aileen Graef   |   May 8, 2014 at 10:49 AM   |   Comments

VIENNA, May 8 (UPI) -- Researchers at the University of Vienna have found that yawning cools down the overheated brain.

Jorg Massen and Kim Dusch conducted the study, which tried to find the range of temperatures that causes yawning frequency to increase or decrease. They conducted identical studies on pedestrians yawning patterns in Vienna, Austria and Arizona in the winter and summer months.

They concluded that people are most likely to yawn at 68 degrees. When it is warmer outside, people are less likely to yawn, because it has little effect on the brain's temperature. In freezing temps, yawning may be unnecessary or even harmful.

Factors like lack of sleep and stress can also contribute to the brain overheating, causing a person to yawn more frequently. Scientists are still searching for the cause of contagious yawning, which happens when a person sees someone yawn and feels the need to yawn, too.

The researchers said they have a strong hypothesis, but it's not definite. Since yawning cools the brain and improves mental efficiency, they think that contagious yawning could be an effort to enhance group vigilance.

Follow @AileenGraef and @UPI on Twitter.
Contact the Author
© 2014 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Recommended UPI Stories
Most Popular
1
Daughters more likely than sons to care for elder parents
2
India asks Pepsi to cut down on sugar in its soft drinks
3
Child vaccination rates are high, CDC says
4
Yoga guru BKS Iyengar dies at 95
5
NIH to test safety of Ebola vaccine candidate
Trending News
Video
x
Feedback