Not sure where to put this, it’s a random thought I want to not forget – bird brains are denser with neurons than ours, of course, mass and weight matter for birds – so perhaps much of the mass and weight of the prodigious human organ isn’t doing cognition or other brain things, if some very clever birds can live without it?
Perhaps it’s a lot of swelling from the beatings and punch-ups, or a lot of padding evolved to lessen brain injury during those events?
Pending annoying and elusive things like evidence, I think it fits AST and maybe the larger narrative too! The plasticity phenomenon – brain maps exist, but portions can be reallocated, functions can be relearned when the mapped area is damaged – does suggest other sorts of redundancy in the brain, other sorts of injury mitigation strategies, not saying I’m the one to ask, but I’ve heard of the circle of Willis, a blood vessel that seems to have that plan. They say human craniums are getting thinner, though, which I assume is involved, but I don’t assume how – there are head-bashing birds, after all. I need to check out woodpeckers and such. Something to keep an ear on for me.
Oh, Hell, theories! This was supposed to be a sideline, not a full-time distraction. Oh well, here goes: cranial size being limited by mom’s pelvis size, perhaps the growth of the brain took the inner thickness from the skull, what it could, from where it could, without growing the outer dimensions beyond that limit? Perhaps brain mass, either for cognition or for cushioning, was more important than helmet thickness – hmm, especially considering we developed technology to smash skulls somewhere along the way? I suppose skull thickness got outstripped, less useful against stone weapons (like stones) than smarts or padding? (Or both, of course?)
I need to learn the timeline – has it simply been a steady thinning over a few million years, or did it thicken first and thin out later? I don’t know, but I just read something that sold me that we haven’t been boxing the entire few million years, perhaps boxing is no use unless your opponent has a thin skull or something, but I also got an idea that abuse doesn’t form or malform your bones so much as your brain. Of course the science is bone-centric, that’s what we have.
Sort of my whole thing.
I’ve happened here upon an insight I know I’ve heard of other folks having – lighter bones, thinner skulls, the idea that these indicate a less violent life, the position of the self-domestication idea . . . not necessarily the case is it, by the argument I made, weapons technology could explain that with no break in the action. Thickness of your bones helps you survive a punch up with your mates, maybe hunting injuries, it doesn’t change the spear’s ability to violate your softer parts?
A long process of lightening may not indicate less violence, only a more technical violence? Just a thought, needs to be slept on. Again though, bones.
I think I have a brain puzzle that needs attention in the ramble above.
The intelligence of some smallish creatures and the flight-ready configuration of some very good bird brains (and a suggestion that those sorts of brains served dinosaurs for millions as many years as we can claim), contrasted with the relative bulk and weight of our own. It’s not subtle – the math doesn’t work, we are not that much smarter, we are on the same scale for intelligence, while the mass and volume is an order of magnitude different.
It’s not even linear, comparing the size of your brain with your dog’s, compared to the intelligence gap, or with a rat’s. I’m guessing this apparent disparity is a known question with a name, like Pascal’s Wager or some such, that we’re twice as clever, but with a brain ten times the size.
In the plasticity book, The Brain That Changes Itself, Norman Doidge’s work, he makes the case that we do not need all of that mass to function, he cites a normal functioning hydroencephalytic with water where ninety percent of that mass is supposed to be! Volume is not smarts, not in any simple, must be sort of a way.
So I’m back to most of it being bubble wrap.
That’s my rap all day long.
February 15th., 2020
LOL – it’s better than my previous theory, believe me