Web Results

en.wikipedia.org/wiki/Yawn

Yawning may in fact reduce oxygen intake compared to normal ... Guttmann and Dopart determined that a yawn causes one of ...

www.healthline.com/symptom/excessive-yawning

Yawning is a mostly involuntary process of opening the mouth and breathing in deeply, filling the lungs with air. It is a very natural response to being tired. In fact  ...

www.webmd.com/brain/news/20110923/why-we-yawn

Sep 23, 2011 ... People yawn more easily in cooler temperatures, supporting the idea that yawning cools the brain. ... Why We Yawn. Yawning Cools Brain, Study Suggests , but Is Yawning Really a Social Cue? .... MS Symptoms & Causes.

www.huffingtonpost.com/2013/06/10/facts-yawning-why-we-yawn-contagious_n_3398301.html

Jun 10, 2013 ... The most recent research on yawning suggests that it exists to cool down the brain. That open-mouthed yawn causes sinus walls “to expand ...

www.thehealthsite.com/diseases-conditions/reasons-for-excessive-yawning-p915

Sep 6, 2015 ... We don't always yawn only when we are tired, it may be due to bigger health ... Wondering what could be causing that excessive yawning?

science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm

So what's behind this mysterious epidemic of yawning? First, let's look at what this bodily motion is: Yawning is an involuntary action that causes us to open our  ...

www.psychologytoday.com/blog/brain-sense/201111/why-do-you-yawn-when-youre-not-sleepy

Nov 16, 2011 ... "Seeing a person yawn triggers yawns. Reading about yawning causes yawns. Sitting in a room thinking about yawning triggers yawning," he ...

www.newyorker.com/science/maria-konnikova/the-surprising-science-of-yawning

Apr 14, 2014 ... “One reason my enthusiasm for studying contagion diminished is because everything causes yawning,” Provine says. (Are you yawning yet?)

medlineplus.gov/ency/article/003096.htm

Jan 31, 2015 ... Read our article and learn more on MedlinePlus: Yawning - excessive. ... called the vagus nerve), caused by heart attack or aortic dissection ...