For a good yawn I need to really open my mouth and push/strain my jaw muscles. If that doesnt happen, then the yawn feels incomplete to my body and it happens again and again till it works “right”
What is the reason/body function behind that?
For a good yawn I need to really open my mouth and push/strain my jaw muscles. If that doesnt happen, then the yawn feels incomplete to my body and it happens again and again till it works “right”
What is the reason/body function behind that?
Sometimes yawning is triggered by a perceived need to get more air (CO2 build-up in the body). The lungs might sense that CO2 went down after yawning, but then the blood deposits more as the lungs were no longer saturated with CO2, and after that you need to yawn again.
Or it’s randomly triggered by some other reaction 🤷
People doing cardio and people exposed to elevated co2 don’t yawn, yet dogs yawn when they see people yawning so its probably not that simple.
I always thought of it like, we’re all comfy and safe social signal. It makes you feel a bit sleepy as well, and it’s contagious because it makes other people want to return the signal. That’s just my theory though. A personal theory!
I mean, when I see videos of animals yawning, like lions, I get the urge myself to yawn. So definitely a complex topic.
The co2 bit it’s part of it, but coming down the brain is another aspect of what makes people yawn.