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Thread: Brain/Body Size Ratio and Intelligence

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    Post Brain/Body Size Ratio and Intelligence

    I've heard it said by some reputable persons that intelligence is influenced by the brain/body size ratio.

    If this were true, then why:

    #Are dwarves not bright

    #Jockeys

    #Small people (The converse tends to be true)

    The brain/body size argument falls apart when it is understood that it is key regions of the brain that are responsible for body function, not the crerbral cortex. In fact, a larger human means a larger cerebral cortex.

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    Post Re: The brain/body size ratio, and intelligence

    Intelligence depends on the concentration of neurons in the frontal lobe mostly, someone larger will have a larger brain most of the time but only because it is necessary for other basic funtional movements, such as running or throwing a ball. Real intelligence depends on the developement of certain areas of the brain, like the areas that deal with mathematics etc..., smaller thinner people do tend to be smarter but this is due more to a social phenomenon, being unable to participate in more physical contests they in a way become bookworms gathering more knowledge.

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    Post Re: The brain/body size ratio, and intelligence

    smaller thinner people do tend to be smarter but this is due more to a social phenomenon, being unable to participate in more physical contests they in a way become bookworms gathering more knowledge.
    This may play a certain role but the constitution types of Kretschmer and Sheldon are clearly related to some hormonal and psychological structures.
    Thats true for good athletes of Leptosomic body build as well. Its not that easy.


    Though this has more to do with personality, less with intelligence per se.
    http://forums.skadi.net/showthread.php?t=8778

    I think a bigger brain is just better and makes people more intelligent if they have the same brain structure of course. If the structure is not the same, size is secondary.
    Thats something we have to keep always in mind and because of that I wouldnt overestimate brain size vs. other important factors.
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    Post Re: The brain/body size ratio, and intelligence

    The brain/body size ratio, and intelligence
    I've heard it said by some reputable persons that intelligence is influenced by the brain/body size ratio.
    The correlations established exist within species and not between them.

    For what it's worth, the correlation between g and brain size, once body size is controlled for, is 0.4 (0.2 for head size) (Jensen, 1998).

    smaller thinner people do tend to be smarter but this is due more to a social phenomenon, being unable to participate in more physical contests they in a way become bookworms gathering more knowledge.
    Knowledge and intelligence are not the same thing.

    Anyway, obese individuals are far less able to participate in most physical events and activities, yet they certainly aren't regarded as intelligent.

    Height and metabolic rate are both positively correlated to g(Jensen, 1998). Therefore, those tall and slim are the most intelligent group; short and obese individuals the least (in terms of categorizations by physical form).

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    Post Re: The brain/body size ratio, and intelligence

    Excuse me, but
    What happens with the headers on football (soccer) or butts and blows on the heads on other hard Sports as american football or rugby...?
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    Post Re: The brain/body size ratio, and intelligence

    Boxing would be a better example. Take a look at Muhammad Ali. That's what happens when you constantly receive blows to the head.

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    Post Re: The brain/body size ratio, and intelligence

    Quote Originally Posted by Northern_Paladin
    Boxing would be a better example. Take a look at Muhammad Ali. That's what happens when you constantly receive blows to the head.
    Ali obviously has a genetic predisposition to Parkinson's that was triggered by boxing trauma, as most boxing veterans are not that debilitated. Just look at Mickey Ward.

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    Post Re: The brain/body size ratio, and intelligence

    Cranial capacity does not automatically correlate with brain size.

    Maybe blacks have a larger gap between the skull wall, and the brain-giving protection against blows.

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