Ever been told to stop yawning? Or been glared at by the teacher when a yawn unwittingly escapes your mouth during their lesson? Well, recent research revealed that yawning is actually designed to keep us AWAKE! Yes, that’s right. It is NOT a precursor to sleep as most parents and teachers would have us believe. It certainly isn’t because we’re bored during an interesting discourse on how many rivers and mountain ranges there are in Guagadudu, or when we’re being initiated into the stimulating world of trigonometry by our ebullient teachers..or even an inbuilt reflex to draw in more oxygen when our body is short of it, as older medical research suggests.
The real purpose of yawning, researches now say, is to COOL the brain so it operates more efficiently and actually keeps you AWAKE. Researchers Gary Hack, of the University of Maryland School of Dentistry and Andrew Gallup, of Princeton University, revealed that “The brain is exquisitely sensitive to temperature changes and therefore must be protected from overheating. Brains, like computers, operate best when they are cool.” So basically, when our brains heat up, say for example, during an ‘exciting’ history lesson, the yawns help it to cool down and keep us awake?
This theory explains another puzzling question: Why are yawns contagious? The brain cooling system says that when we contagiously yawn we are participating in an ancient, hardwired ritual that evolved to help groups stay alert and detect danger.
It’s not copying another person’s sleepiness, say scientists at the University of Albany in New York, who are behind the latest research. “We think contagious yawning is triggered by empathic mechanisms which function to maintain group vigilance,” says Dr Gordon Gallup, a leading researcher at the university. This belief is further supported by the observation of University of Maryland’s Robert Provine that paratroopers report yawning before jumping!
But there are other theories. It’s been suggested contagious yawning could be a result of an unconscious herding behaviour – a subtle way to communicate to those around us, similar to when flocks of birds take flight at the same time. Yet another theory suggests contagious yawning might have helped early humans communicate their alertness levels and co-ordinate sleeping times. Basically, if one decided it was time to sleep they would tell the others by yawning and they would do it in return to show they agreed.
And as further proof that humans originate from the ape family, apparently chimpanzees also suffer from contagious yawning, according to researchers at Kyoto University in Japan. They are thought to be the only other creatures, apart from humans, who do so.
My take on the matter? Yawn on!

