"Why is yawning so contagious"?

one person is a room yawns, everyone starts

Answer:
You know what? I yawned after I read the cross-examine! =)
(I guess just the mention of the word can trigger the necessitate ~ I was *not* aphorism it was a boring question)
The yawn reflex is regularly described as contagious: if one person yawns, this will mete out another person to "sympathetically" yawn.[5] Mythbusters attempted an experiment documenting this effect surrounded by episode 2.28, "Is Yawning Contagious?", with a conclusion of somewhat confirmed. The proximate cause for contagious yawning may feign with mirror neurons, i.e. neurons surrounded by the frontal cortex of certain vertebrates, which upon man exposed to a stimulus from conspecific (same species) and occasionally interspecific organisms, activates alike regions in the brain.[6] Mirror neurons hold been proposed as a driving force for recreation which lies at the root of much human learning, e.g. terminology acquisition. Yawning may be an offshoot of alike imitative impulse.
To look at the issue contained by terms of evolutionary lead, yawning might be a herd instinct.[7] 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 member of the group in writ to synchronize sleeping patterns and period of activity. It can serve as a word in displaying substantial, canine teeth.[citation needed] This phenomenon has be observed among various primates. The threat tick is a way of maintain order contained by the primates' social structure. The contagion of yawning is interspecific, for example a human yawning in front of a pet dog can incite the dog to yawn as resourcefully. Oddly, sometimes sympathetic yawning may be caused by simply looking at a picture of a personality or animal yawning, or even seeing the word yawn.[citation needed] A specific study was conducted on chimpanzees. A group of chimpanzees be shown a video of other chimpanzees yawning, and the study chimpanzees yawned also. This helps to to a degree confirm a yawn's "contagiousness".
http://en.wikipedia.org/wiki/yawning...
Because a yawn is contagious its elegant to yawn its angelic for you.
myth busted
I dont know but it feels nice ^^
You yawn because at hand is a lack of oxygen to your brain, so the brain signals a yawn for maximum intake of oxygen within one breath... If people are yawning at impossible to tell apart time then it could be that they none of them are breathing surrounded by enough oxygen!!??
Yawning is a sign that your brain wishes oxygen. You see someone else yawn it sends a message to your brain saying that you should do it to. Its benign of like smoking, when you see someone else doing it, you want one to. But solely if you smoke I guess.
Thats a really good interview.and I really don't know. It happens to me adjectives the time I'll see someone yawning and ka-boom I'm doing it myself. I actually yawned a touch reading your question. My best answer would be that when someone yawns after a long daylight or in the morning for wake up and at night staying up behind whenever, when someone sees someone yawning I deem that they realize how tired they really are, or they are just wake up a little more.I other heard that you weren't getting adequate oxygen to your brain and thats probably it too. Thats a really good cross-examine and I'm wondering myself..hope this answer was adjectives to you!! =)
I have read lots theories on the subject, but the one that I give most credence to is that as diurnal mammals it "was" a type of alarm, if you will, that kept the group surrounded by synch with respectively other. Imagine: many thousands of years ago EVERYONE pulled their weightiness or were banished or perished due to apparent reasons, so when it be time to sleep, ALL persons needed to sleep so that when it be time to "work": forage, gather, hunt, etc., everyone be able to filch full advantage of the daylight. Which, also for comprehensible reasons, is the best time for homo erectus to utilize.
cos it is transmitted thru the atmosphere
Yes, I've seen it on MythBusters beside the conclusion that Yawning is contagious. Shellbugger had it, phew!. Thanks for the info. Learned seriously.
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