Why do you yawn?

Answer 1

The fact of the matter is that neither science nor medicine has yet come to any solid conclusion as to what causes yawning.

I have concluded that what makes me yawn is when my wife says, "watch this" and then she proceeds to yawn.

Answer 2

#1
I do know that when a room builds up in carbon dioxide, a lot of people in
the room, the carbon dioxide causes you to become sleepy and you begin to
yawn even if you are not tired. It would seem to me that yawning is the
streching of the neck and head muscles in order for the veins to constrict
and move blood more rapidly to the brain. So hypoxia of the brain or carbon
dioxide would trigger it.

For further information, study about the veins and how blood is transported
through them.



#2

Everyone yawns - babies, kids, teenagers, adults. Some birds, reptiles and most mammals also yawn. However, the reason why we yawn is a bit of a mystery. There is also very little research about yawning because for most people yawning is not a problem. Here are a few things that are known about yawns:

1. The average duration of a yawn is about 6 seconds.
2. In humans, the earliest occurrence of a yawn happens at about 11 weeks after conception - that's BEFORE the baby is born!
3. Yawns become contagious to people between the first and second years of life.
4. A part of the brain that plays an important role in yawning is the hypothalamus. Research has shown that some neurotransmitters (for example, dopamine, excitatory amino acids, nitric oxide) and neuropeptides increase yawning if injected into the hypothalamus of animals.

Answer 3

I only yawn when I am extremely BORED to tears. I have a bad habit of yawning while on the phone when the conversation is dull.

Answer 4

Yawning gives your brain a boost of oxygen. That boost will wake you up when you are sleepy, which is why you yawned in the first place.

Answer 5

Yawning is a way for the lungs to do a deep breath to provide more oxygen to the lower portions of the lungs and diaphragm area. I think this is what some types of hiccups try to do as well.

Answer 6

Very simple answer - - - Yawning is a way to get additional oxygen to the brain. Usually need that to stay alert

Answer 7

Causes of yawning are as follows :

1. An indication of tiredness, stress, over-work or boredom.
2. An action indicating psychological decompression after a state of high alert.
3. A means of expressing powerful emotions like anger, rejection, apathy or tedium.

Answer 8

You yawn when your brain is in need of more oxygen. Yawning is just the body's way of obtaining that oxygen.

Answer 9

Daily life: Yawning is your body's way to get more air into your body
Singing: To make a more mature sounds. (yawning is when u lift ur soft pallet)

Answer 10

people yawn when there is a pressure difference between their inner ear and the air outside of it. yawning corrects the imbalance. it is not necessarily associated with sleeping or being tired.