just curious. :)
2007-07-29 13:56:04 · 5 answers · asked by kraz 2 in Health ➔ Diseases & Conditions ➔ Infectious Diseases
Yawning is a psychological response to a lack of Oxygen. When you are sleepy, you literally breath less, so your brain, to prevent you from dying, makes you yawn so your air intake increases. If anyone else hears you yawn, the brains react as if it was them who were lacking Oxygen, so they make the other persons yawn as well. In other words, you can fool other people's brains into making them yawn because they think they need to.
2007-07-29 14:01:29 · answer #1 · answered by Juan 3 · 1⤊ 0⤋
Mental suggestion.
I wouldn't really consider this something to be in "Infectious Diseases"..... but it's just how the mind works (and we don't really know enough about the brain to say exactly what it is).
Same reason that when you think about a nice, big, juicy lemon... freshly squeezed out juice dripping off of it.......... it makes your mouth water ;-)
As far as WHY you yawn, there are several different reasons... lack of oxygen, boredom (again, mental suggestion), being tired, etc.
2007-07-29 20:59:16 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Its just because you and who ever you are in the room with are experiencing the same environment. If something is boring to you, it is boring to your buddy next to you and they were going to yawn sooner or later anyway.
2007-07-29 21:00:13 · answer #3 · answered by Jill S 5 · 0⤊ 1⤋
I guess that the sound and the way a person looks when he or she yawns remind people that they're tired too...=]
2007-07-29 20:59:45 · answer #4 · answered by Anonymous · 0⤊ 1⤋
It's just a reflex. There is no thought process involved. You pick up on it involuntarily.
2007-07-29 21:06:11 · answer #5 · answered by Irish 7 · 0⤊ 0⤋