As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
As far as I know, the purpose of yawning isn’t really understood, but it’s present in nearly all land vertebrae. Maybe it’s a universal bug in the breathing animation code.
Maybe you’re at 99% because you’ve been yawning?
Ok, I am sufficiently caffeinated and bothered to look up a study: https://pmc.ncbi.nlm.nih.gov/articles/PMC3678674/
According to the above, they suspect it has to do with helping to keep you relative alert/awake but also, possibly to cool the brain and adjust ear pressure.
The thing is that my o2 saturation doesn’t drop between yawns, which is what leads me to believe that’s not it.
Yeah, there doesn’t seem to be anything (at least in that study) to suggest it actually impacts blood oxygen levels either.