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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.medicinenet.com/yawning/symptoms.htm

Jun 30, 2015 ... Learn about the diseases and conditions that may cause yawning. Other symptoms and signs associated with yawning include sleepiness and ...

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

Sep 6, 2015 ... This irritation causes the brain to send out abnormal signals which can be, in some cases excessive yawning. Again a rare cause for excessive ...

medlineplus.gov/ency/article/003096.htm

Jan 31, 2015 ... Causes may include: Drowsiness or weariness; Disorders associated with excessive daytime sleepiness; Vasovagal reaction (stimulation of a ...

www.healthgrades.com/symptoms/yawning-excessively

Oct 26, 2016 ... Yawning Excessively Information Including Symptoms, Diagnosis, Treatment, Causes, Videos, Forums, and local community support.

www.anxietycentre.com/anxiety/symptoms/excessive-yawning-anxiety.shtml

Because there are many medical conditions that can cause anxiety-like sensations and symptoms, including yawning excessively, we recommend all new, ...

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

Jun 10, 2013 ... But unlike sleep apnea or laptops in the bedroom, yawning is an aspect of ... That open-mouthed yawn causes sinus walls “to expand and ...