Тэкст ад tomo2009 - English
Yawn
- Why yawning is contagious to some creatures, i.e. human?
- Some studies have proven against a common misconception that yawning has something to do with concentration of oxygen or carbon dioxide in the brain.
- In fact people who need more oxygen in their brain may not yawn quite often.
- The reason why we yawn is because we want to cool down the temperature of our brain by letting cooler air contact with blood vessel in our head.
- An experiment shows that person with an ice bag on top of his head yawn less frequently.
- This holds true for other animals.
- An experiment shows that parakeet only yawn at certain range of temperature.
- Unfortunately, yawning is not contagious for some animals like parakeet.
- Contagious yawning in fact can be advantageous to some animals, which enhances the awareness among groups.
- Further studies show that contagious yawning is linked to the sense of empathy (share the feeling).
- For instance, social impaired children yawn less frequently when they see other yawning.
- Yawning frequency can have different level: family> friend>people known>stranger.
- Some other animals yawn for different purposes.
- For example, monkey yawns to show its sharp teeth; penguin yawns to attract mates; snake yawns to make adjustment on its breathing.
- tomo2009December 2013Прагаласуй зараз!
КАЛІ ЛАСКА, ДАПАМАЖЫ ВЫПРАВІЦЬ КОЖНЫ СКАЗ! - English