2007-03-20 11:48:53 · 9 answers · asked by act as if no one is watching 1 in Science & Mathematics ➔ Biology
It seems contagious. If you yawn in class, you'll probably notice a few other people will start yawning, too.
have a good yawn!
2007-03-28 11:06:59 · answer #1 · answered by blergh 4 · 0⤊ 0⤋
Yawns usually occur due to lack of oxygen - the vagus nerve (CN10) sends a signal to your diaphram to spasm, sucking air deep into your lungs.
One theory as to why yawns are contagious is due to the fact that when you see someone yawn, you tend to hold your breath - causing lack of oxygen, leading to you yawning...
2007-03-20 11:58:24 · answer #2 · answered by ? 5 · 0⤊ 0⤋
Sorry I'm unable to give specific details regarding the programs I watched, but recently (within last 6mths) have seen 2 separate programs related to this event.
They did the usual things; people used at diff'nt times of day, b4 & after exercise, control groups etc and the ultimate conclusion was that this preconceived event is infact nothing more than pure myth.
There was no result out of any of the groups that proved ANY factual/statistical basis that it actually exists.
Maybe we're just mostly unaware & only notice other people doing it when we do it ourselves?
2007-03-26 02:26:39 · answer #3 · answered by Kyn E 1 · 0⤊ 0⤋
a yawn is a psycological response to visual stimulous. our minds see a yawn and emmidiately want to obtain the pleasure of yawning. in fact, even thinking about a yawn can cause the same reaction.
2007-03-20 11:57:41 · answer #4 · answered by Daniel 2 · 1⤊ 0⤋
Defense mechanism!
1, people like to mirror body language, it makes them feel comfortable with eachother, so...mirror the yawn! Same as if someone smiles at you, usually you automatically smile back!
2 Display of teeth used to be a threat (waaay back) so even now tooth display is met by tooth display automatically to show you too have 'weapons'!
xx
2007-03-20 11:56:05 · answer #5 · answered by Londonbaby 3 · 0⤊ 0⤋
This is my science teachers theory: when one person yawns, it means that they aren't getting enough oxygen. When one body yawns, the other bodies around it think that they aren't getting enough oxygen, either. So then they yawn.
2007-03-25 08:09:11 · answer #6 · answered by Anonymous · 0⤊ 0⤋
When you see someone else yawning,the same part in your brain triggers a yawn.It's nature's reminder to yawn.
2007-03-20 11:58:48 · answer #7 · answered by mark t 2 · 0⤊ 0⤋
Daniel nailed it. People often respond to smiles, laughter, coughing etc in the same way. Start laughing in a group of people and see if the group doesn't join in. And they don't even know why.
2007-03-20 12:26:26 · answer #8 · answered by sarge 6 · 0⤊ 0⤋
Because I love you
2007-03-27 10:16:02 · answer #9 · answered by ppc422 2 · 0⤊ 0⤋