Why Do We Have Two Brains?

This was originally going to be one video but the more I read, the more information I wanted to share. So this is a precursor to the next video where the real meat of our two brains comes into play.

Sources:

BRAIN LATERALIZATION: A COMPARATIVE
PERSPECTIVE -

[PRIMEVAL]

Funny experience: Had a brain surgery in my left temporal lobe. It was swollen and my verbal memory didn’t work at all for 1 week and then just slowly came back
First thing after the surgery was me askin my mom how everything went. She asked „how what went?“ I just answered you, the surgery of course!!!“ XDD
Later I asked the doc how everything went 3 times in a row. Only on the third time I noticed sth was off…

In the week after that I learned my hardest to remember song on piano and solved geometric puzzles while being unable to talk to people because I’d forget what they said half a second later.

Aw other funny story: I was sitting at home and suddenly heard music. Song did sound familiar. And there were hands moving in front of me. But they looked strange and I had no idea who they belonged to. Few seconds later I realized I was playing while half knocked down by seizure…

Anyways point is: It’s so freakin crazy how independent the parts of the brains are and what happens when you bring them out of balance XD

[enilenis]

What's most weird to me is that the body looks symmetrical on the outside, while being highly asymmetrical inside. Why only some organs are duplicated, but not others?

[genericdragon]

Suggested reading: The Origin of Consciousness in the Breakdown of the Bicameral Mind.

[Uejji]

I'm troubled by some of the superlative language in this video. Just because something evolved a certain way doesn't mean that it is the best way. It only means that it is good enough and there is not enough evolutionary pressure to improve, or it may mean that a better solution may exist, but evolution took the wrong track to reach it, or it may mean that a better solution can be reached, but it would involve changes that are deleterious before being able to reach the better solution.

[Mrbrightside]

Correction. Evolution doesn’t determine what is “best” for a given environment it only nestle to be good enough for the environment. But I understood the point you were making. Love your content.

[ButWhySci]

Had to reupload. Forgot to keyframe something.

[plaguedoctr]

But....birds are supposed to swallow small rocks. They have an organ called a gizzard, which basically does their chewing for them with the assistance of rocks.

[professionalshitposter]

2:00 "or skillfully placing the front hoof of a mountain goat" *goat enters ultra instinct*

[davidmurphy]

Outstanding. Had never heard the explanation for the transposition of the hemispheres. Fascinating idea. Of course, with evolution, all you need is no good reason for it not to be a certain way, you don't always need a positive selection mechanism. The issue I had with it was that, being in all vertebrates, it was obviously selected early. The early vertibrates weren't on the land and so couldn't have fallen as described and it's still maintained in fish vertibrates to this day. Could just be like the laryngeal nerve on the girrafe; an early hangover.

[BritishBeachcomber]

Lateralization and a dominant eye in chick eggs is a fallacy. Hens regularly turn the egg to maintain an even temperature. Both eyes receive, on average, the same amount of light.

[constants_are_variable]

I like how your videos cover such a wide spectrum of science related topics from astrophysics to advanced biology - my dopamine seeking brain is satisfied. Last time I saw a channel with 50k subscribers with such great content was Joel Havers and I knew it was going to blow up.

[WINOFFICIAL]

My brain was curious so it clicked on this yours was too

[RonG]

Evolution did not determine that was the "best" way to be in that environment. It's just that those traits did better than the competition.

[aintgonnatakeit]

2:35 We drummers have an ever constant struggle to maintain skill in both arms (and legs for double bass players). Being able to play patterns by leading with either hand you have so much more skill and sound so much better!

[atomatopia]

“Why are brains segmented?”
“So we gave this chicken ADHD…”

[colly]

"two brains, one mind" sounds like TOOL lyrics

[katinkax]

Brain related topics are super interesting. Thank you for your explanations and that you keep doing that.. I’ll always be interested in your videos and stuff.. ❤️

[keegaroo]

thank you for animating the goat sliding down the mountain that was beautiful lol

[ДмитрийЛжетцов]

as a physicist i can tell that, because brain is practicaly floating in liquid inside our skull, in case of an impact it will "float up" in the opposite direction (you can watch "Floating helium balloon in a moving car"), hitting skull from opposite site from impact, therefore if animal will fall on its right side, it will cause damage for the left side of the brain. Actually i think it is more helpful to have "one working side with working brain" and not "damaged half + working brain" and "working half + damaged brain", so this explanaition might be only half working)

[excfontec]

there’s another theory for brain lateralization: that in the evolution to vertebrae’s the head twisted around for better land viability — crossing the nerves