What is the connection of yawning with our brain?

Answer 1

At a very minimal level, yawning involves moving a variety of muscles, all of which are controlled by your brain. So once your brain decides to yawn, it has to also become involved in the specifics of yawning.

But the brain is more involved than that, because yawning is not something that most people choose to do. In fact, merely seeing or thinking about yawning too much is enough to cause most people to yawn themselves. And that's the puzzling part.

Obviously yawning involves an intake of air. So it's easy to see why a person might yawn when they're tired - they might need a small boost of energy that yawning gives so they can keep going. But what does that have to do with 'social yawning'?

Some would argue that it has nothing to do with it. What it DOES have to do with is a matter of debate. But if just THINKING about yawning makes you yawn without intending to, then something is clearly going on!

(I've yawned about twenty times just writing this!)

Answer 2

A yawn is a reflex of deep inhalation and exhalation associated with being tired, with a need to sleep, or from lack of stimulation. Pandiculation is the term for the act of stretching and yawning. Yawning is a powerful non-verbal message with several possible meanings, depending on the circumstances. It is also claimed to help increase the state of alertness of a person. It could possibly be from lack of oxygen. The exact causes of yawning are still unknown.

A previous long-standing hypothesis is that yawning is caused by an excess of carbon dioxide and lack of oxygen in the blood. The brain stem detects this and triggers the yawn reflex. The mouth stretches wide and the lungs inhale deeply, bringing oxygen into the lungs and hence to the bloodstream. It is almost certain, however, that this hypothesis is incorrect. One study has documented that this effect does not exist.

Answer 3

A yawn lets you take in more air so more oxygen gets to your brain. You yawn when you're tired because your breathing gets shallower and you take in less air than you need at times. A yawn counteracts that.
Try breathing shallowly for a short time and you will yawn!

Answer 4

we yawn because of lack of oxygen