Yawning Cools Overheated Brain

Wednesday, Apr 25, 2018, 10:57 am

By:James Fraser

Yawning is a sign of sleepiness, tiredness or boredom. Do you know yawning is a brain's function to cool itself when it's overheated or over worked? When you yawn, your brain relaxes instantly. The process also increases blood flow (oxygen) to the brain. 

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