You know how yawning is also a social function, and seeing someone yawn makes you yawn?
I just got forced into a good neurofluid flow reorganization session just by reading the title.
Yawning has an unexpected influence on the fluid inside your brain
61–70 of 82 posts
Re: Yawning has an unexpected influence on the fluid inside your brain
#62Why do I yawn more when I'm cold?
Re: Yawning has an unexpected influence on the fluid inside your brain
#63[deleted]
Re: Yawning has an unexpected influence on the fluid inside your brain
#64[deleted]
Re: Yawning has an unexpected influence on the fluid inside your brain
#65The contagious nature of yawning is so weird. It has to be evolutionarily advantageous because it's so wide spread, but it's also non-obvious.
I assumed it was a kind of warning system: "Another member of the tribe detected impairment/fatigue and took measures to become more alert, perhaps you should raise alertness also."
Re: Yawning has an unexpected influence on the fluid inside your brain
#66"To tire, perchance to yawn."
Re: Yawning has an unexpected influence on the fluid inside your brain
#67Earlier quoted context omitted.
A trait doesn’t have to be advantageous to persist just non-detrimental.
Yeah that's (to me) a more accurate framing, also evolution is bad at revisions so even if there are minor disadvantages to a setup so long as it's not affecting your ability to have and raise kids it's basically completely absent as far as evolution is concerned. For example there are some wild inefficiencies in body layout left over from fish body patterns where the nerve from the brain to the voice box wraps down…
That remains as it is because it's very difficult to evolve away from. Evolution is very good at chasing and sticking around local optima. Big changes are risky.
Re: Yawning has an unexpected influence on the fluid inside your brain
#68Earlier quoted context omitted.
A trait doesn’t have to be advantageous to persist just non-detrimental.
and not even that, I'd narrow it further to not detrimental before and during the prime reproductive periods of a species. After that period, detrimental traits are totally fair game and more dependent on technology, culture, and family care dynamics. Heart disease later in life caused by genetic predisposition to high cholesterol isn't something people generally select for or against in a partner, but its effects ha…
Parents must also be alive for long enough to care for their children until they can sustain themselves.
Re: Yawning has an unexpected influence on the fluid inside your brain
#69Why do I yawn more when I'm cold?
cold = contracted vessels etc = less fluid movement = yawn required.
happens to me a lot when i am on shrooms too
Re: Yawning has an unexpected influence on the fluid inside your brain
#70The contagious nature of yawning is so weird. It has to be evolutionarily advantageous because it's so wide spread, but it's also non-obvious.
There's probably a strong survival advantage in convincing whoever is leading a meeting that it's time to adjourn.