Get your good morning yawn right here.. Web MD: Yawning cools the brain, says Andrew C. Gallup, PhD, a postdoctoral research associate at Princeton University. We have collected data on rats, parakeets, and humans. All the data supports the brain-cooling hypothesis, Gallup tells WebMD. Heres the basic idea: When you start to yawn, powerful stretching of the jaw increases blood flow in the neck, face, and head. The deep intake of breath during a yawn forces downward flow of spinal fluid and blood from the brain. Cool air breathed into the mouth cools these fluids.
Posted on: Sat, 25 Oct 2014 11:49:57 +0000
Trending Topics
Recently Viewed Topics
© 2015