Comparative racial neuroanatomy thread

Discussion in 'BMP - Public' started by Nottuh, Nov 4, 2016.

  1. Nottuh

    Nottuh Active Member Governor

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    A 1986 study from Australia consisted of a comparison of 11 Caucasian brains and 8 Australian Aboriginal brains. Some of the interesting differences found, apart from a nearly 200 cc difference in the mean brain volumes between the groups were a relatively larger frontal lobe and occipital lobe in the Aborigines (as a percentage of total brain volume) and also a larger lateral visual cortex in Australian Aboriginals (both absolutely and relative to total brain volume). The total size of the whole visual cortex was similar between both groups. Interestingly enough, one of the Caucasian brains was also found with the same type of enlarged lateral visual cortex as the Aborigines.

    The authors of the study speculated that the difference in total brain volume may have been in part environmental, although they did not rule out genetic factors playing a role in this. They also pointed out that the differences in relative size between brain areas could not be explained by environmental factors. They made reference to studies from authors who found that Australian Aboriginal children had better visual memory skills than White children, and suggested that this may be linked to the size of the lateral visual cortex in Australian Aboriginals.

    Based on the findings of this study, it seems that Whites tend toward a more Melonhead-like neuroanatomical form compared to Australian Aboriginals and also that the differences in the structure of visual cortex between the two groups may represent differences in visual abilities between the two groups (medial visual cortex larger in Caucasians, lateral visual cortex larger in Aborigines).

    This study can be found for download here:

    A quantitative study of Australian aboriginal and Caucasian brains. | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1261675/
     
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  2. Robotnick

    Robotnick Well-Known Member Typed

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    Aborigine culture has a lot of emphasis on dreams. They have things like "dreamwalking" and sometimes they don't even differentiate between the dream world and the physical world.

    They also seem to like Heavy Metal music a lot. Seems to me like a deepsock thing though.
     
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  3. Nottuh

    Nottuh Active Member Governor

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    An interesting article has shown that in comparison to the Cro-Magnon 1 cranium and Upper Paleolithic Europeans as a whole, the average modern human cranium has smaller occipital and frontal lobes, as well as (to a lesser extent, according to the article) smaller parietal lobes.

    An image from the article showcasing the morphological and size differences between the brain of Cro-Magnon 1 and a typical modern human:

    [​IMG]

    Also, thanks to Shibboleth for showing me this article.

    The article can be downloaded here:

    First description of the Cro-Magnon 1 endocast and study of brain variation and evolution in anatomically modern Homo sapiens | https://www.researchgate.net/publication/257799835_First_description_of_the_Cro-Magnon_1_endocast_and_study_of_brain_variation_and_evolution_in_anatomically_modern_Homo_sapiens
     
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  4. Thalmoses

    Thalmoses Founder Administrator

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    Looks like devolution. Technology eating our brains.

    Enthalpy draining from the individual to the Beast.
     
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  5. Nottuh

    Nottuh Active Member Governor

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  6. Vejiortan

    Vejiortan Geheimrat Baron

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  7. Vejiortan

    Vejiortan Geheimrat Baron

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    http://www.cell.com/current-biology/pdf/S0960-9822(15)00671-5.pdf

    "For example, as the proportion of the YRI component
    increases, the temporal surfaces move posteriorly and inward.
    The proportion of the CEU component is associated with protru-
    sion of the occipital and frontal surfaces. Increases in the pro-
    portion of the EA component are accompanied by variations in
    temporal-parietal regions. The NA component is associated
    with flattening of the frontal and occipital surfaces."

    So CEU (central europeans, from utah) - more towards "TT".
    And East-Asians more towards M-back and enlarged (more "complex") temporals.
     
    Last edited: Apr 9, 2017
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