The size of the Negroid brain is significantly lower in volume than the Mongoloid or Caucasoid brain...

The size of the Negroid brain is significantly lower in volume than the Mongoloid or Caucasoid brain. The size of its frontal lobes are small and uncomplex, and the brain as a whole shows an unimpressive, moderate degree of fissuring (Lynn, 2006a, pp. 210-211; Rushton, 2000a, pp. 130, 133).

Converting brain volume into the number of neurons, Mongoloids average more than half a billion more neurons than Negroids (Rushton, 2000a, p. 133; Broom, 1918, p. 63-79; Howells, 1948, p. 118; Galloway, 2005, pp 31-47). East Asians (Han Chinese, Koreans, and Japanese) have the highest ratio of brain to body mass, but the record for brain size goes to Russian writer Ivan Turgenev, at 2012 gms (Corballis, 1991, p. 66). The heritability of brain size is about 0.9 (Lynn, 2006a, p. 67).

The ridges (gyri) between the groves (sulci) at the surface of the brain greatly increase the surface area of the cerebral cortex, the outer layer of the cerebrum. Since the cerebral cortex processes information, increased brain fissures increases the percentage of the brain that is cerebral cortex and should increase intelligence without increasing the volume of the brain, although this is difficult to establish quantitatively (Baker, 1974, p. 432). Negroids and some retarded people have fewer convolutions (fissures) in the cerebral cortex of their brains, where abstract thought is performed (Broca, 1858, cited by Rushton, 2000a, p. 106).

There are many physical properties of the brain that are associated with greater intelligence. More intelligent brains show faster nerve conduction, less glucose utilization in positron emission tomography [PET scans], faster reaction times, faster inspection times, faster speeds in general, greater circumference and volume, smaller standard deviation in reaction times, greater variability in EEG [electroencephalogram] measures, shorter white matter T2 relaxation times, and higher gray-white matter contrast with magnetic resonance imaging [MRI] (Miller, 1994d). The thickness of the three outer layers (the supragranular layer) of the cerebral cortex (the six outer layers), increases from lower animals to man (Corballis, 1991, p. 67). The supragranular layer is 15% thinner in blacks than in whites (Vint, 1934). The nerves in blacks are reported to be larger (Burmeister, 1853).

The prefrontal area typically constitutes 29% of a man's brain (Herrick, 1956, p. 385). The human neocortex is over three times as large as expected for a primate matched for body size (Passingham, 1982). Compared to Caucasoids and Mongoloids, in Negroids the back of the brain is more developed and the front less developed (Broca, 1858, cited by Rushton, 2000a, p. 106; Bean, 1906; Levin, 1997, p. 105). This is noticeable in the more sloping forehead of Negroids and the length of their skull. Vision is processed in the back of the brain, hearing at the side, and planning and abstract thought at the front. Blacks have better hearing than other races (Murphy, 2006). Thus, a brain that is more devoted to one of these functions than to others will have a greater mass of brain tissue in that area and the skull shape will be expanded in that area.

A frontal lobotomy, which removes the anterior frontal area of the brain, leaves a person conscious and seemingly normal, but unable to plan and take initiative (Penfield, 1957, p. 226). That is why Negroids have been compared to lobotomized Caucasoids (Simpson, 2003, p. 705).

Racial differences in the relative sizes of different areas of the brain are suggested by the way smoking affects the races. Compared to white smokers, black smokers absorb 30% more nicotine per cigarette and take longer to rid their bodies of the drug (Dr. Nora Volkow, "News Release," National Institute on Drug Abuse, Jan., 20, 2006). Numerous studies have demonstrated significant racial differences in the metabolism of tobacco-related products (Wilson, S.E., "Study Examines Racial Differences Among Children To Environmental Tobacco Smoke Exposure Cincinnati Children's Center for Environmental Health," Mar. 15, 2005). Since different neurotransmitters in the brain take up nicotine at different rates, this implies that blacks and whites have significant differences in the relative sizes of different areas of the brain. African Americans have much lower slow brain wave activity during sleep than do Caucasians, which also suggests structural differences in the brain ("Slow Wave Activity During Sleep Is Lower In African-Americans Than Caucasians," Science Daily, June 13, 2007).

In our journey to become human, our brain not only increased in size, but certain portions, such as the frontal lobes, the cerebral cortex, and its supragranular layer, increased disproportionately. Also, the sulci and gyri increased and deepened. Other parts, such as the olfactory bulb, devoted to smell, have increased less than proportionately. These changes were greater in Eurasians than in Africans.

what about dick size tho

...

...

Can this thread get pinned? It would save so much shitposting.

>that filename

bumping for actual conversation
What are the native americans? I believe somewhere I heard they are very anthropometrically and craniometrically similar to mongoloids, looking at the cheekbones, although the jaw differs, the native being wider, would that then imply they migrated from siberia long ago enough that they had time to adjust dietarily and evolutionarily?

I take the I.Q findings with a pinch of salt, as early anthropological research was done before the times of cultural relativism, though I think there is lots of merit, I think people overlook the other uses of anthropometry in taxonomy.

...

Another interesting aspect are the african influences on the anglo-iberian, modern irish.
the the protrusion of the jawline, the HOL UP lips, etc

So?

very model-esque people would be the north-eastern africans, the phoenecians and egyptians, mixing with eastern caucasoid bloods from the middle east, having caramel skin with a straight nose and more physically haughty facial structure.

I think he is half memeing, there are iq differences, bone density differences, muscle differences etc in the races, but using it as a racial purity argument kind of kills modern racial anthropometry.
I know its a strange thing to take on considering how objective it is, but its a legitimate science if you look more into it.

by the way, Caucasoid does not mean "White". Caucasoid ranges from western europe to the midde east, skin colour is not consistent but the science, being dictated by craniometry and anthropometry, indicatively categorizes arabs into the caucasoids.
Similarly, native americans are mongolian, based on this science.
Interestingly enough the australian aboriginals are in their own category. Polynesian nomads I guess?

I thought those classifications (Caucasoid, Negroid, etc) have widely been discredited by actual molecular genetics.

I'd rather follow that than """psychologists""" musing about statistics they found in a book from 1858.

Not that I am aware of, its been ostracized for its divisive claims, but I don't think it has actually been debunked.

No, they're largely superseded by the much more complex and detailed information the genes have given us, but as broad groupings they hold up very well. Really tho the difference is between "African" and "Everyone Else".

yeah again when it comes to anthropoligical research, if you ever find yourself reading anything before the times of Franz Boas then be aware of rampant eurocentrism in the research findings.

We've come a long way in humility but we may have thrown out the baby with the bathwater. Racial differences do exist, and they are important, we should be doing science to alleviate the social problems this causes but the whole subject is so taboo that it will end your career if you publish the "wrong" facts. Sad!

I think that scientists can avoid these thing by using words that are possibly hard for the normals to translate, and that wouldn't fit well into news titles, words like "craniometric diversity in volume". Essentially just stay away form saying I.Q, use positive words like "diverse". This would just be on paper anyways, just make it too verbose to be headlined. There are many sciences that have made progress without being headlined.

"Human biodiversity" is a good one, everyone loves "diversity". But the problem is political, and at some point a politician has to sign off on it, nothing that reeks of racialism will ever see funding in this political climate. Meanwhile, our "one-size-fits-all" socialisation model does more harm to inner-city googles than an education geared to the google mind would and indeed did before the state banned corporal punishment and the pedo panic drove men out of teaching.

I bet neanderthal had also bigger dick.

>Since the cerebral cortex processes information, increased brain fissures increases the percentage of the brain that is cerebral cortex and should increase intelligence without increasing the volume of the brain, although this is difficult to establish quantitatively (Baker, 1974, p. 432)
>should increase intelligence
>difficult to establish quantitatively

If you spend enough time in /pol/ you will learn to deny meteorologists on the basis that their data is questionable.
But you will also learn that it's perfectly fine to believe in pseuds who have no data at all!

They had sloping foreheads. They didn't have the grey matter that really counts.

cranial capacity is easy to measure with modern tomography, idiot

Please tell me what religion all these rich capitalist fat cats share in common.

Is a sloping forehead good or bad (usually) ? Most eminent scientists tend to have sloping foreheads.

It's largely irrelevant. Cranial capacity itself is not a reliable indicator, rather you have to look at the degree of enchephalization.

there is no quantitative correlation between human cranial capacity and intelligence
unless, of course, you know something I don't
where's your paper?

>tomography

I'm glad you took the time to handtype that.

...

Was the "Sad!" on purpose?

So does this mean, that as a black man I should drop out of my mech. engineering program?

>engineering
Not because you're black, but yeah you should

Oh, a Trump voter. That explains a lot.

Mods please keep this thread I wanna see if we can have an actual intelligent discussion this time. Maybe...

...

Autism is when there is a lack of synaptic pruning in early childhood so that eventually causes larger brains. I have autism and have always had above average intelligence. Though I of course lack social skills and think like a robot.
While brain size is of course an apparent superior attribute, it would be better if there weren't too many synapses in certain types of the brain. Which results in sensory sensitivity, behavioral problems, and social issues. But if this thread is about races and not neuroscience then I just wasted my goddamn time.

>brainlet tears
You shouldn't post here if you have a two digit IQ

>You shouldn't post here if you have a two digit IQ
I'm sorry, user.

Liberalism

It's okay bernout. Just get back to flipping burgers and lets forget this all happened :)

Thank you, sir.

...

boy SJWtards do love projecting so much

absolutely BTFO

I think you missed the point, it's a joke, don't be so sensitive

Nice Veeky Forumsence posts

samefag

kek

No surprise there lmao

oh my god...your average pedophile mlp bernie supporter right there.

so true

Why not porn ?
(seroiusly)

He wouldn't have balls to be a pedo.

Also Trump was an alternative after the cucking of Bernie. Heard a lot of people to transfer their support B -> T.