Yawning cools the brain


	Yawning cools the brain

pokkets

12-15-2008 11:31 PM

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3 Comments |

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12-16-2008 1:04 AM

debbyski

My head is getting overheated just looking at that pic baby

12-16-2008 10:57 AM

NS-Clips

interesting!

12-16-2008 11:31 AM

ajwood

I thought yawning was about the involuntary inhalation of air to accelerate a rise in oxygen into the blood stream.
As the brain tires or is just waking, oxygen helps it get going or keep going.
If I feel like yawning while nearing a job interview, I take a deep breath through my nose to delay the involuntary yawn during the interview.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/6cee0a77-25f1-4469-835b-c90f8a55579e/1A31AD84-53EF-4049-B838-A84077D01B21/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest" href="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest" style="font-size: 11px;">www.abc.net.au</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest">Jennifer Viegas</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P class="first">If your head is overheated, there's a good chance you'll yawn, according to a new study that found the primary purpose of yawning is to control brain temperature. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.abc.net.au/img/9A720A73-308B-4C7C-8340-D274C73C0AF8" alt="yawning woman" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P>The finding solves several mysteries about yawning, such as why it's most commonly done just before and after sleeping, why certain diseases lead to excessive yawning, and why breathing through the nose and cooling off the forehead often stop yawning. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P>The key yawn instigator appears to be brain temperature. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P>"Brains are like computers," says Andrew Gallup, a researcher in the Department of Biology at <A target="_blank" href="http://www2.binghamton.edu/">Binghamton University</A> who led the study, which has been accepted for publication in the journal <A target="_blank" href="http://www.sciencedirect.com/science/journal/00033472"><EM>Animal Behavior</EM></A>. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P>"They operate most efficiently when cool, and physical adaptations have evolved to allow maximum cooling of the brain." </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.abc.net.au/science/articles/2008/12/16/2447520.htm?site=science&topic=latest"><P>"In addition, yawning when it is extremely cold may be maladaptive, as this may send unusually cold air to the brain, which may produce a thermal shock." </P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/1A31AD84-53EF-4049-B838-A84077D01B21/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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