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Yawn...
Why, when another person yawns, do we occasionally (quite often, I would say) yawn ourselves?
I always wondered.
yawning is contageous
*runs*
| quote: |
| Originally posted by tubularbills yawning is contageous *runs* |
no one knows. no one knows what the purpose of a yawn is for.... lots of theories though.
http://en.wikipedia.org/wiki/Yawn#Contagiousness
| quote: |
| The yawn reflex is often described as contagious: if one person yawns, this will cause another person to "sympathetically" yawn.[3][10] Observing another person's yawning face (especially his/her eyes), or even reading about or thinking about yawning, can cause a person to yawn. You could possibly be yawning from reading this section or looking at these pictures.[3][11] However, only about 55% of people in a given audience will respond to such a stimulus; fewer if only the mouth is shown in a visual stimulus.[12]The proximate cause for contagious yawning may lie with mirror neurons, i.e. neurons in the frontal cortex of certain vertebrates, which upon being exposed to a stimulus from conspecific (same species) and occasionally interspecific organisms, activates the same regions in the brain.[13] Mirror neurons have been proposed as a driving force for imitation which lies at the root of much human learning, e.g. language acquisition. Yawning may be an offshoot of the same imitative impulse. A 2007 study found that children with autism spectrum disorders, unlike typical children, did not yawn after seeing videos of other people yawning; this supports the claim that contagious yawning is based on the capacity for empathy.[14] To look at the issue in terms of evolutionary advantage, if there is one at all, yawning might be a herd instinct.[15] Other theories suggest that the yawn serves to synchronize mood behavior among gregarious animals, similar to the howling of the wolf pack. It signals tiredness to other members of the group in order to synchronize sleeping patterns and periods of activity. This phenomenon has been observed among various primates. The threat gesture is a way of maintaining order in the primates' social structure. Specific studies were conducted on chimpanzees[16] and stumptail macaques[17]. A group of these animals was shown a video of other conspecifics yawning, and both chimpanzees and stumptail macaques yawned also. This helps to partly confirm a yawn's "contagiousness". Gordon Gallup, who hypothesizes that yawning may be a means of keeping the brain cool, also hypothesizes that "contagious" yawning may be a survival instinct inherited from our evolutionary past. "During human evolutionary history when we were subject to predation and attacks by other groups, if everybody yawns in response to seeing someone yawn, the whole group becomes much more vigilant, and much better at being able to detect danger."[5] |
i was talking about this the other day with someone. it's the same thing when you're at a club and one person checks their cell and then a bunch of other people have to check theirs too.
Nobody knows. But it has been studied:
http://www.world-science.net/exclus...309_yawnfrm.htm
Screw this thread and those two URLs. I've just yawned like mad in the last minute. 
| quote: |
| Originally posted by nchs09 no one knows. no one knows what the purpose of a yawn is for.... lots of theories though. |
"
| quote: |
| Originally posted by tubularbills biggest contribution is thought that yawning is a sign that your brain is low on oxygen. not deadly low or anything like that, but low enough that it says, "hey asshole, breathe in and gimme some O2 " |
| quote: |
| Originally posted by jonze yawning is nature's way of saying you're too stupid to breath |
| quote: |
| Originally posted by tubularbills biggest contribution is thought that yawning is a sign that your brain is low on oxygen. not deadly low or anything like that, but low enough that it says, "hey asshole, breathe in and gimme some O2 " |
| quote: |
| Originally posted by Sushipunk Ah, see, that's kinda what I thought too. Low oxygen = some yawning. However, I was out on my deck (plenty of O2), and I yawned right after my gf did. |
So how about that Will Smith? Hes such a sexy black man. I would be so happy if I could wake up with his bed wood in my mouth.
| quote: |
| Originally posted by Direct So how about that Will Smith? Hes such a sexy black man. I would be so happy if I could wake up with his bed wood in my mouth. |
| quote: |
| Originally posted by Direct WHAT THE FUCK????? I didnt say that....someone hacked my account again. |
| quote: |
| Originally posted by Direct WHAT THE FUCK????? I didnt say that....someone hacked my account again. |
i just yawned when i thought about yawning.
mindh4x
It's theorized that it's the brains defense mechanism.
A yawn is caused by the lack of oxygen reaching the brain (usually caused by shallow breathing when tired). However, this can also happen if you are suffocating as well.
So when you see someone yawn, your brain receives a signal that tells it that someone within your vicinity is not getting enough oxygen, and as protection, it incites you to yawn to be sure that you have enough yourself.
P.S. Sorry if someone already posted that. I didn't have time to read the whole thread.
I yawned after the 2 first posts.
i yawned 4 times reading this wtf...make it 5 now
cognitive response.
and when jennypie yawns that just means she needs a dick in her mouth.
i feel like yawning while reading this, i'm trying my hardest not to, and somehow finding it hilarious 
it's the end of the world as we know it!!!!!!!!!!!!!!!!1111111111111111
I saw this thread get posted and it made me want to post another thread.
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