Monday, August 25, 2014
The Yawn: Six seconds to energy
Hey--don't yawn now--this is my blog!
Yawning has many reasons and roles, according to a University of Texas health researcher.
Yawning used to be believed to be a need for a burst of oxygen. And it's not just because of boredom--people yawn before parachuting out of a plane.
The new theory is that yawning keeps the brain cool in temperature. They tested this my putting probes into rat brains. The rats yawned after a slight temp raise. (And probably because they were tired of being probed.)
Another study showed people yawn more in summer. Hot--got it.
The contagion of yawning--seeing someone yawn makes you yawn--may be an attempt to make everybody alert.
Here comes that sabertooth--yawn up everybody!
Sounds to me like quite a few theories. Yawn.