/sci/ - Science & Math

[Anonymous No.2268206]

Elephants have THREE BRAINS???

[Anonymous No.2268241]

The elephant's brain is very convoluted, indicating its intelligent, flexible behaviour. It has three especially enlarged areas:
a) the temporal lobe, related to hearing and possibly the elephant's ability to distinguish and communicate through various sounds, including infrasound. The temporal lobes may also function in recognition and in storage of information related to the senses.
b) the cerebellum, related to muscle coordination, perhaps related to the highly coordinated trunk movements
c) the olfactory lobe, with olfactory nerves leading to the trunk, which is a very adaptable organ.

[Anonymous No.2268255]

>>2268241
How is this difference (from human brains) explain in an evolutionary context. Why they have 3 but humans and most others seem to have 2.

[Anonymous No.2268265]

Gorilla brain looks like a beta version of the human brain.

[Anonymous No.2268271]

>>2268265
Do you want to know a secret...

[Anonymous No.2268272]

dolphin brain looks like an hairy ass

[Anonymous No.2268300]

And thus, we can see the symmetry and elegance of the human brain as proof of our superiority

[Anonymous No.2268316]

>>2268255
evolutionary context?

did you ever notice that huge honking nose those things haul around?

super sensitive, highly dexterity, and great strength...this all requires a lot of brain power.

we don't have those since we have opposable thumbs...we never needed an engorged olfactory lobe with our puny honkers..

maybe...idk...i sell tacos for a living

[Anonymous No.2268334]

what do you mean people have two?

In its early embryonic condition a human brain consists of three hollow vesicles, termed the hind-brain or rhombencephalon, the mid-brain or mesencephalon, and the fore-brain or prosencephalon; and the parts derived from each of these can be recognized in the adult. Thus in the process of development the wall of the hind-brain undergoes modification to form the medulla oblongata, the pons, and cerebellum, while its cavity is expanded to form the fourth ventricle. The mid-brain forms only a small part of the adult brain; its cavity becomes the cerebral aqueduct (aqueduct of Sylvius), which serves as a tubular communication between the third and fourth ventricles; while its walls are thickened to form the corpora quadrigemina and cerebral peduncles. The fore-brain undergoes great modification: its anterior part or telencephalon expands laterally in the form of two hollow vesicles, the cavities of which become the lateral ventricles, while the surrounding walls form the cerebral hemispheres and their commissures; the cavity of the posterior part or diencephalon forms the greater part of the third ventricle, and from its walls are developed most of the structures which bound that cavity.

[Anonymous No.2268380]

Didn't some worm like fish have like four seperate brains and 7 hearts?

[Anonymous No.2268417]

autonomous nerve clusters and aortic arches?

certainly many organisms have multiple sets...not exactly brains and hearts, but for the sake of argument, close enough I'd say.

[Colonel Coffee Mug !phJ7yIcs.Q No.2268424]

>>2268265
>>2268271

(Psst. You. Yeah. You. The secret is that the human brain is a linearly scaled-up monkey brain, but DO NOT LET THE SINGULARITARIANS KNOW.)

[Anonymous No.2268428]

Neurofag here

OP, elephants don't have three brains. What appear to be three "brains" in the elephant brains are merely the two hemispheres of the brain plus the cerebellum in the back. All animals (with a brain) have those structures. In the case of humans the cerebellum is somewhat hidden by the massive cortical sheet that envelops most of the human brain. The pic to the left though shows the human brain from the side. You can see the cerebellum in the bottom right area.

>>2268255
Elephants have a large olfactory bulb because they rely on smell a lot (which is also why they have such a fucking huge nose). Same thing with hearing (and their ears). The cerebellum is large because they're large animals and thus have a lot more shit to coordinate.

Humans, in contrast, have a laughably tiny olfactory bulb because we don't rely on smell much. Instead we have a neocortex which completely dwarfs the rest of the brain (as well as the cortex of any other animal when you go by relative sizes). We also place a much heavier emphasis on sensitivity and motor control in the fingers.

[Anonymous No.2268430]

>>2268417

>solar plexus is the second brain

[Anonymous No.2268441]

>>2268265
A chimpanzee brain looks even more similar. The only difference you see at first glance is that the chimp brain is only 1/4th the size of a human brain.

[Anonymous No.2268446]

>>2268428
their ears are not primarily a radiator for the brain?

i was given the impression that most of their vocalizations were picked up by their feet since it travels better underground

[Anonymous No.2268501]

>>2268428
> animals (with a brain)
> (with a brain)
you mean... THERE ARE ANIMALS THAT DO NOT HAVE A BRAIN?

[Anonymous No.2268509]

>>2268501
Just take a look in the mirror.

[Anonymous No.2268512]

>>2268509

[Anonymous No.2268516]

>>2268509
>implying he has a mirror nearby.

also funny x)

[Anonymous No.2268522]

>>2268501

Cnidarians and sponges are animals. They do not have brains. Amazing.

[Anonymous No.2268523]

>>2268501

i'm probably being trolled but a jellyfish is a good example.

Lewes Egived

[Anonymous No.2268534]

>>2268501

Yes. That's what I said.
cestodes or tapeworms fit the bill. Already, they've lost their gut, so it's likely that the nerve cells are nil or very nearly so. Perhaps the head or scolex has some detecting ability, but it's more likely that the larval form or onchospere is very "neurotic" with lots of nerve cells and some coordination, in order to penetrate the gut wall when it hatches.

I don't classify that as a brain personally, but I'm sure science may have a differing opinion.

[Anonymous No.2268544]

>>2268509
TOLD STATUS:
[ ]Told
[ ]Not told
[X]Bohr Ruthertold

[Anonymous No.2268546]

dolphin brain looks like an asshole

[Anonymous No.2268558]

>>2268544

LOL

[Anonymous No.2270422]

>>2268428

>The cerebellum is large because they're large animals and thus have a lot more shit to coordinate.

So why did huge motherfucker dinosaurs manage with walnut brains?

[Anonymous No.2270426]

>>2270422

More efficient operation due to higher oxygen levels in the atmosphere?

[Anonymous No.2270442]

>>2270422
its not the size he is really intending to talk about, it is the quality. dinosaurs were large with low quality, humans are smallish with highish quality, elephants are large with high quality. If there are a shit ton of nerves, they need to be dealt with, if there arent as many, obviously they dont consume as much brain power

[Anonymous No.2270473]

ITT: Brians.

[Anonymous No.2270476]

>>2270426

If I increase the oxygen levels in my environment will that make me turn superior?

[Anonymous No.2270480]

do dolphins have 3 brians?

[Anonymous No.2270487]

Clearly define 'brain'

[Anonymous No.2270492]

>>2270476

No, but if a group would live in an oxygen rich environment for a multitude of generations, it might help stimulate certain occurrences inside the brain. Just conjecture obviously.

[Anonymous No.2270496]

Question:

Did brains evolve many times independently or are they all descendants from one proto-brain?

If brains evolved several times then what types of brains are there?

[Anonymous No.2270497]

i do remember a brain mass/body mass graph in a book. humans had the 6 times the average ratio for mammals.

[Anonymous No.2270508]

>>2268501

That's why I am not a real vegetarian and eat clams.

[Anonymous No.2270511]

>>2270497

But mouse even have more. The brain of a mouse is 3.5% of it's entire body. The human brain on the other hand is 2% of the human body.

[Anonymous No.2270522]

>>2270442

But many large dinosaurs were predators. So they must have had the ability to understand causal relationships necessary for hunting. Also their brains must have been able to manage all the bodily functions of such large organisms.

And think about bees. Their brains are miniscule but they show complex behavior.

So it can not be size alone that matters. I think the physiology of the brain is much more important. Maybe the brain of some insects (like bees) is much more efficient than mammal brains and (if scaled up) would put mammals to shame.

[Anonymous No.2270529]

>>2270522

What are you talking about? Insects are retarded.

[Anonymous No.2270534]

>>2270511
Apparently Douglas Adams had a point.

[Anonymous No.2270537]

>>2270529

They can count, categorize objects, recognize faces, solve novel problems and communicate precise information about locations - all with brains the size of pinheads.

Yeah...their brains aren't impressive at all.

[Anonymous No.2270541]

>>2270511
>implying a computer is judged by the size of the monitor

[Anonymous No.2270548]

>>2270541
>implying the brain would be the monitor and not the processor...

[Anonymous No.2270559]

>>2270548
>implying its a loose analogy where brain = processor and screen = body meaning size of organism is irrelevant and intelligence is not dependent on some kinda brain/body ratio is all im saying

[Anonymous No.2270567]

>>2270559
>intelligence is not dependent on some kinda brain/body ratio

But I was just replying to this dude: >>2270497

And although the size obviously isn't ALL that matters you can not deny that it has to matter - why would the brain of Homo Sapiens have grown so much in the last 300.000 years?