Although not fully understood, yawning appears to be not only a sign of tiredness but also a much more general sign of changing conditions within the body.. Yawning may make others yawn (that is, it seems "contagious")and may indicate behavior based on social cues. Other hypotheses: One is that when weare bored or tired, we just don't breatheas deeply as we usually do. As this theory goes, our bodies take inless oxygen because our breathing has.. Yes, yawningis contagious, but why dowe actually do it in the first place? Trace takes a look at the competing theories out there.. Here are a few of the facts we know for sure when it comes to yawning. There Are Many Theories, But Little Proof There's little research to support any of a number of theories as to why weyawn. FIrst off, we don't only do it when we're tired.. Yawning involves taking a big gulp of air in, which travels through our upper nasal and oral cavities, cooling the mucus membranes and in turn the blood vessels in the brain. Which is why, apparently, weyawn more in warm weather than wedo in the cold.. You YawnBecause of Tiredness. Some people yawn when they feel tired or bored.. Humans yawn a lot. You are probably thinking about doing it right now. But many other animals do not. In particular, most plant-eating mammals do not yawn, at least not often. Horses are one of the few that doyawn regularly.. Unfortunately, the topic of why doweyawnis much in debate and most theories, while convincing, are unproven. That means essentially, no-one knows why weyawn. It is widely believed that yawning occurs becausewearetired.. Another hypothesis is that weyawnbecausewearetired or bored. But this, too, is probably not the case because the PVN also plays a role in penile erection, which is not typically an event associated with boredom.. Some believe that weyawn when wearetiredbecause it helps to arouse us or prevent us from falling asleep. The reasoning behind this is that every time you yawn, your heart rate increases by as much as 30%.. February 20, 2007 3:47am CST. Why doweyawn first of all.is it becausewearetired while yawning or is it because of lack of sleep.what doesyawning indicate? we also know that yawningis contagious isn't it? what are your views here?. There is, so far, much speculation about what causes this and not enough research to be conclusive.Wedo not always yawn when wearetired.. Weyawnbecausewe're tired or bored. It seems simple, and yet it's not correct. Recent studies have shown that yawning serves exclusively to cool down the brain. There is a link with sleepiness, but that link is only indirect.. Too many yawns, especially if I am not tired, makes me wonder about the meanings of yawning. I wonder about why I yawn so much at sometimes.. Yawning in dogs however, has no definitive reason. When we see our pets yawnwe take it for granted that their reason for yawningis pretty much the same as the reason why wedo.. Wedo it every day, making it the most common mystery of the human body. And it really is a mystery. We grow up being taught yawningis a signal of beingtired, but there is so much more to it than you might think.. Yawningis common; while often associated with beingtired or bored, you may be surprised by the underlying reason you yawn when you're tired.. There are several theories about why weyawn. One theory suggests that we don't breathe as deeply when we're bored or tired as wedo when we're excited or exerting energy.. I think it isbecauseweyawn as our bodies aren't getting enough oxygen. He claims it is specifically from beingtired? What is the correct meaning please and thanks?. Mom claims cops put her basketball player son, 11, in handcuffs because he 'wouldn't stop bouncing the ball' and wasbeing 'disrespectful'.. Most people understand that human beings yawn when they aretired and need to rest.. Why DoWeYawn and Why Is It Contagious? Yawning and stretching predict brain temperature changes in rats.. Why DoWeYawn? So natural a thing, maybe akin to breathing! But yet the thought flutters around - What isyawning really about?. Why WeYawn There are things wedo on a daily basis and we don't know the reasoning. Have you ever wondered the reason why weyawn ,and why it's contagious?. While someone who yawns may betired, the heart rate quickly rises during a yawn. This increased heart rate suggests yawning can be a sign of alertness rather than sluggishness. Yawning, in general, may simply be a way for the body to change the state of awareness it is in. 11 Weyawn when wearetired. Several studies have shown that weyawn when wearetired. Yawning in such a case might be the brain's own way of getting in more oxygen to the body and improving its functions.. Yawning an an inopportune moment can be embarrassing. Here's a look at why weyawn, and how you might avoid it.. Yawningis interpreted to have a variety of meanings, ranging from tiredness to boredom.. "Yawningis rude because it implies that the person speaking isn't interesting enough to keep people awake," a Quora user wrote last year.. Why doweyawn? Experts reveal WHY yawningis so contagious. YAWNING - usually a indicator of beingtired - can be contagious, which means you want to yawn when you see someone else yawning.. We often sigh because of boredom. So why dowe really yawn and sigh? Are there health-related issues associated with yawning and sighing?. For example, when you aretired or suffering from sleep deprivation it is known that exhaustion is a cause of rising brain temperature. So yes you will undoubtedly yawn more when tired, however, it does not help you stay more awake.. Animals, birds and reptiles yawn, too! Yawning seems to occur when weare bored, tired or too warm, but the irresistible impulse to. is that tiredis (tire) while yawnis to open the mouth widely and take a long, rather deep breath, often because one istired and sometimes accompanied by pandiculation. As a adjective tired. is in need of some rest or sleep.. I cannot stop yawning! Why doweyawn when wearetired? Yawningis a reflex. It is something that our body does without us even having to think about it. Some people believe that our bodies yawn when we need more oxygen.. Chimpanzees and dogs also find yawns contagious. In fact, the reasons weyawn when we're tired remains vexing to researchers because many theories lack evidence. For instance, he said it's been floated that weyawnbecausewe lack oxygen or need to cool the brain.. Yawningis an involuntary process that is usually triggered when you aretired.. Some scientists believe people yawnbecause our bodies have changed to do that through history. They say ancient people learned to yawn over many years.. Why DoWeYawn? You've probably seen someone yawn and felt compelled to take a deep inhale and exhale yourself.. One is that when weare bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.. Scientists are not entirely sure why weyawn, although it does tend to happen when we're tired or stressed.. That theory went out the window because nobody can prove it. The reason yawnsare contagious? Power of suggestion perhaps. If you're out late with your friends after school, you're probably tired.. If you are bored or tired your breathing will slow down which will cause you to take in less oxygen and so your body will trigger a yawn to help breathe in more.. Wondering why your dog yawns? He's probably not just tired - there are a few different reasons why dogs yawn.. You may have heard the theory that you yawnbecause your brain requires more oxygen. This is not true.. He says that's not true but it isbecause I can tell by the way he acts and how he tried to avoid not getting one. Last night before bed I asked him why he is always hard (in a joking way) n he said because I'm tired and I just yawned. I didn't believe that because I didn't think that could cause an.. There are theories on this benefiting the respiratory and circulatory system. Could we need more oxygen in our lungs or dowe need to expel more carbon dioxide that has been building up?. This theory claims that you yawnbecause of low oxygen levels in the blood. Yawning causes you to take a deep breath, stimulating respiratory. As soon as someone lets out a yawn, it spreads like wildfire across the room (and apparently just writing about yawning can set off the chain reaction as well).. CM 3060748 Stop yawning and stretching. sharptoothed 1728314 I amyawningbecause I feel sleepy.. I just believe that it istiredness as all my lectures are in the morning and shortly after I wake up.. Unfortunately, frequent yawning can also warrant concern because it can be a sign of disease. Snakes are susceptible to all types of bacterial and fungal infections due to the type of prey they devour.. Check out this WHY DO YOU YAWN WHEN YOU'RE TIRED? article to find out some interesting facts about why weyawn. It's not just becausewe're tired.. verb. pull or extend. I always like to _ before I do sports. I usually _ for 15 minutes. yawn. verb. open your mouth wide and take in breath, usually because you aretired or bored People _____ because they aretired, bored or excited.. And it was said that yawningis attributed to the Shaytaan becauseyawning comes from fullness of the stomach, which generates laziness. Scientists are not really sure why weyawn however, there are popular theories. Some believe that weyawn when wearetiredbecause it helps to arouse us or prevent us from falling asleep..