What is yawning?
yawning is involuntarily open one’s mouth wide and inhale deeply due to tiredness or boredom.
Why do we yawn?
Before we’re born, yawning starts and has associated with boredom or being tired. Research now has suggested many solutions to this question.
Scientists are split into two camps——one believes yawning has a physiological significance and health benefits while others believe yawning is the psychologically triggered and once was used as means of communication. What we know is that humans and most animals yawn for one reason or another. (Source: Mercola )
- Yawning is an involuntary behavior that may perform the important function of cooling your brain.
- When we yawn, the influx of cool air may ventilate our sinuses and facilitate brain cooling.
- Brain temperatures increase when you’re sleep deprived, which may be one reason why exhaustion triggers excessive yawning.
- Yawning may also indicate a capacity for empathy and may be an evolutionarily old process of great social significance.
- We Yawn to Regulate The Temperature of Our Brains and Stay Alert.
One popular theory behind yawning is related to the shallowness of your breathing. In other words, the more shallow your breathing, the less oxygen enters your blood. In response, your body triggers a yawn that increases the amount of air you breathe in and increases your blood oxygen level.
However, a compelling theory explored by Princeton University researcher Andrew C. Gallup, Ph.D., and colleagues links yawning to sleep deprivation, tiredness and cooling your brain.
Benefits Of Yawning.
The researchers suggest that yawning is triggered by increases in your brain temperature and that the physiological act of yawning is a way to promote brain cooling. Yawning helps cool your brain by forcing you to breathe deeply and by increasing blood flow to the brain through the act of stretching your jaw. The researchers have hypothesized that there may actually be an optimum temperature range in which you could expect to have the highest rates of yawning. So, when the air outside is cooler than your brain temperature, as in wintertime, yawning brings in some of the cooler air to regulate the brain’s temperature.
Another theory about why we yawn is to bring more oxygen into our bodies. When you yawn, you fill your lungs with oxygen and remove a build-up of carbon dioxide. This might explain why we tend to yawn more in the company of others. Larger groups of people produce more carbon dioxide, which means you need more oxygen to compensate.
Whatever the answer is to the mystery of yawing, there are a couple of medical conditions that are sometimes associated with yawning. Too much yawning could signal a heart problem or a health condition associated with excessive fatigue.
source: Doctors Health Press.