Why do we yawn?

Everybody yawns – even unborn babies in the womb – and yet researchers are not quite sure why we do it.

Although humans yawn more often when we are tired or bored, scientists have ruled out sleepiness or lack of oxygen ( which would cause sleepiness) as causes. Instead, they suspect yawning might help us keep a cold head. As a supercomputer, the brain needs to stay cool to function properly. Each yawn pumps air into sinus activities in the head, cooling the brain in the process. And because the brain and body are slightly warmer just before bed, we tend to yawn when we are tired.

Why do we need to sleep?

Video games, track meets, chemistry class – you are waking hours are crammed with activities and tasks that give your noggin a real workout. All that processing causes chemicals to clutter your brain. A good night’s sleep clears your head – literally. While use snooze, your brain goes into housekeeping mode, flushing the toxins and preparing itself for a busy day of math classes, socializing, and beating your brother in basketball.

How much sleep do we need?

That depends on your age. Kids between 5 and 12 need about 11 hours of sleep. Older kids and adults can get by with 7 or 8.

Is yawning contagious?

Absolutely! In fact, yawning is contagious that even reading about yawning can make you yawn. (Go ahead and get it out of your system). Studies have shown again and again that people who see other people yawn – even in videos are more likely to yawn.

Why is yawning contagious?

Yawns thandon’t catch on among children younger than five or among people with emotionally dampening disorders. That leads researchers to believe contagious yawning is just another way humans reinforce social bonds between people. Humans are social and emotional animals. We tend to understand and feel emotions of friends and even strangers. Yawning falls into that category. When we see someone yawn, we yawn.

Is yawning contagious for other animals besides humans?

You bet, at least among higher primates such as chimpanzees and bonobos ( for the same reason as for humans, researchers suspect ). Even more surprising, experiments show dogs catch yawns from watching people.

Why do I get sleepy?

Whenever you try to defeat drowsiness to finish one more Harry Potter chapter, you’re actually locked in a losing battle over bedtime with your brain stem. This chunk of gray matter at the base of your brain regulates your sleep, along with other automatic bodily functions such as breathing and the ticking of your heart.

What happens if we don’t get enough sleep?

Doctors believe that a good night’s sleep comes with many benefits, including improved creativity and mental sharpness. Avoid going to bed and you will soon suffer the consequences : crankiness, clumsiness – even hallucinations if you miss a few days. Your brain will go on strike, and easy tasks will become supremely difficult until you turn in and switch off.

How can we get a good night’s sleep?

  • Keep to a sleep schedule. Set a bedtime and wake -up time and stick to them.
  • Relax with a book before bed, but don’t keep your smartphone within reach. It is a certified sleep stopper.
  • Don’t fall asleep with the television on.
  • Don’t eat any big meals or chug any large drinks within two hours of bedtime.
  • Getting plenty of sun exposure during the day helps you sleep at night, so spend some waking hours outside!

References :

WHY – Answers to everything, Image publications.

Categories: Health

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