I also remembered watching Mad Labs before on yawning.
A yawn (synonyms chasma, pandiculation, oscitation from the Latin verb oscitare, to open the mouth and have bad smells come out is a reflex of deep inhalation and exhalation associated with tiredness, stress, overwork, lack of stimulation, or boredom. Pandiculation is the term for the act of stretching and yawning. Yawning is a powerful non-verbal message with several possible meanings, depending on the circumstances. The claim that yawning is caused by lack of oxygen has not been substantiated scientifically. However, the exact causes of yawning are still undetermined. The word "yawn" has evolved from the Middle English word yanen, an alteration of yonen or yenen, which in turn comes from the Old English geonian.
Hypothesized causes of yawning
1. A means of cooling the brain.[5]
2. An action used as an unconscious communication of psychological decompression after a state of high alert.
3. An excess of carbon dioxide and lack of oxygen in the blood. [1]
4. A way of displaying (or indicative of) apathy.
5. Tiredness.
6. A means of equalizing inner ear pressure, which can be triggered by another's yawning.
Thats called Mythbusters here in the US, ie, one of the best shows on TV.
I yawned. I've yawned three times while typing this. Couldn't be the fact that its 3:15 AM?
...and what do they say? Why do people yawn?Heh. I'm watching the Mythbusters which has the yawning study on it.
How bizarre is that?
...and what do they say? Why do people yawn?