Results 1 to 10 of 10

Thread: Why Are Human Brains Getting Smaller?

  1. #1
    Account Inactive
    Join Date
    Jan 2004
    Last Online
    Thursday, July 5th, 2012 @ 07:07 AM
    Subrace
    Atlantid
    Country
    United States United States
    Location
    Metropolis
    Gender
    Age
    39
    Family
    Single
    Occupation
    Journalist
    Religion
    Protestant
    Posts
    6,672
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    10
    Thanked in
    10 Posts

    Why Are Human Brains Getting Smaller?

    Why has the trend for the last 30,000 years been for smaller brains. Why is it that despite this we are getting more intelligent?

  2. #2
    Funding Member
    "Friend of Germanics"
    Skadi Funding Member


    Join Date
    Jan 2007
    Last Online
    @
    Ethnicity
    -
    Gender
    Posts
    2,858
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    5
    Thanked in
    5 Posts

    Arrow Re: Why Are Human Brains Getting Smaller?

    It's not the size of the brain that denotes intelligence.... its the surface area of the outer layer of the brain, the grey matter, that counts. Surface area is increased by frequency and depth of convolutions of the brain. (N.B. although women have smaller brains than men, they have often a larger surface area of grey matter, due to having more and deeper convolutions!! Hehe)

    Smaller heads may be a naturally selected feature due to the decreased likelihood of the mother of smaller headed babies dying in natural childbirth. Of course, this isn't so much of an issue nowadays with modern medical intervention.

  3. #3
    Account Inactive
    Join Date
    Oct 2005
    Last Online
    Monday, November 17th, 2008 @ 04:46 AM
    Ethnicity
    North Pontid/Iranid
    Subrace
    pontic steppe specimen
    Country
    United States United States
    Gender
    Family
    In a steady relationship
    Occupation
    grad student
    Politics
    Nature rules, we participate.
    Religion
    Nature is universal, not equal
    Posts
    127
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Why Are Human Brains Getting Smaller?

    I dont know the specific facts to back this up, but ive heard that the brain size alone isnt so much the thing to focus on as is the size of the brain/braincase in ratio to the rest of the body. So as the brains in modern humans may be losing some mass, so is the robustness of the skull and skeletal structure, keeping equal or perhaps even increasing the mass of the brain in percentage to the rest of the body, but physically still taking up less space as the size of our physiques are in general becoming less robust.

    I could be wrong, lets hear some more minds at work.

  4. #4
    Account Inactive
    Join Date
    Jan 2004
    Last Online
    Thursday, July 5th, 2012 @ 07:07 AM
    Subrace
    Atlantid
    Country
    United States United States
    Location
    Metropolis
    Gender
    Age
    39
    Family
    Single
    Occupation
    Journalist
    Religion
    Protestant
    Posts
    6,672
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    10
    Thanked in
    10 Posts

    Re: Why Are Human Brains Getting Smaller?

    Quote Originally Posted by Bridie
    It's not the size of the brain that denotes intelligence.... its the surface area of the outer layer of the brain, the grey matter, that counts. Surface area is increased by frequency and depth of convolutions of the brain. (N.B. although women have smaller brains than men, they have often a larger surface area of grey matter, due to having more and deeper convolutions!! Hehe)

    Smaller heads may be a naturally selected feature due to the decreased likelihood of the mother of smaller headed babies dying in natural childbirth. Of course, this isn't so much of an issue nowadays with modern medical intervention.
    I think that's a very likely explanation. And it would also seem that having too big of a head would prove to be too much of a balancing act for a bipedal animal like oursevles.

    And perhaps we are as smart as we need to be right now.

    Scientists generally agree that women and men are close to the same in intelligence. However there is also much evidence to support the fact that women and men are good at different things. And this is a direct reflection of brain structure.

  5. #5
    Funding Member
    "Friend of Germanics"
    Skadi Funding Member


    Join Date
    Sep 2003
    Last Online
    Friday, September 5th, 2008 @ 07:36 AM
    Subrace
    Nordid
    Country
    United States United States
    State
    California California
    Gender
    Family
    Married
    Posts
    4,095
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    17
    Thanked in
    16 Posts

    Re: Why Are Human Brains Getting Smaller?

    The disadvantage of inheriting a large brain is the box it comes in. It is very hard for the mother to push a large head through the birth canal. Some study somewhere reported that a baby's IQ could be linked positively to the spread of his mother's pelvis. Cranial capacity is linked to IQ but that is not the only factor in IQ.

    Let's face it folks, it doesn't take a big brain or a high IQ to survive and reproduce today. There is probably very little survival value in our society for high IQ or a big brain.

  6. #6
    New Member
    Join Date
    Mar 2006
    Last Online
    Sunday, March 15th, 2009 @ 03:31 AM
    Status
    Available
    Ethnicity
    German
    Ancestry
    Germany, England
    Subrace
    Don't know
    Country
    United States United States
    State
    Arizona Arizona
    Location
    Pinal County
    Gender
    Age
    56
    Family
    Single, looking
    Occupation
    retired
    Politics
    White Nationalist
    Religion
    undecided
    Posts
    4
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Why Are Human Brains Getting Smaller?

    There could be a number of reasons. Modern technology doesn't require us to think as much. Humaniods brain size dramatically increased with increased meat consumption. People are eating less meat these days. Use it or lose it? In pre-civilization days, humans survival depended on his/her ability to think and resolve problems. Today people live whether they think or not as long as thery eat. Very good question. It could also be a statistical issue depending on the source of donor brains that have been measured.

  7. #7
    Senior Member Nixie's Avatar
    Join Date
    Aug 2006
    Last Online
    Wednesday, August 23rd, 2006 @ 07:06 AM
    Subrace
    North-Atlantid
    Country
    Vinland Vinland
    Location
    Idaho
    Gender
    Age
    41
    Family
    Married, happily
    Occupation
    Mother
    Religion
    Irminist/Odalist
    Posts
    39
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Why Are Human Brains Getting Smaller?

    Intelligence also has more to do with what percentage of the brain is utilized. A massive brain with superhuman potential is worthless if the owner can only activate 5% of it. Even though we supposedly only use 10% of our current brain potential, maybe that's more than has been used in times past. So we don't need to get bigger at all.
    Or, alternatively, humans used to use a greater percentage of brain, but it has steadily declined to 10% and evolution is finally doing something about it by gradually getting rid of the excess we no longer use. Maybe we have failed to live up to the optimism of nature/the gods implicit in our large brains.

  8. #8
    Senior Member Ragnar Thorsson's Avatar
    Join Date
    Aug 2007
    Last Online
    Wednesday, October 20th, 2010 @ 09:22 AM
    Ethnicity
    Dutch
    Subrace
    Nordid/Keltic admixture + CM
    Country
    Netherlands Netherlands
    State
    Friesland Friesland
    Gender
    Politics
    F*ck politics!
    Posts
    1,423
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    2
    Thanked in
    2 Posts

    Re: Why Are Human Brains Getting Smaller?

    Why Are Human Brains Getting Smaller?
    It's the beer!

  9. #9
    Progressive Collectivist
    "Friend of Germanics"
    Skadi Funding Member

    Agrippa's Avatar
    Join Date
    Nov 2003
    Last Online
    Monday, January 31st, 2011 @ 10:22 PM
    Ethnicity
    German
    Subrace
    Atlantid
    Location
    Asgard
    Gender
    Politics
    Progressive Collectivist
    Religion
    Catholic
    Posts
    6,968
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    11
    Thanked in
    11 Posts

    AW: Why Are Human Brains Getting Smaller?

    Negative-, contraselection which led to physical and psychic degeneration.

    There were various heights, peaks of positive biological development like in the Mesolithicum, late Neolithicum, Bronze Age and Iron Age in Europe, especially under more mobile, well fed and warlike people like successful hunter-gatherers, half-nomadic mixed farmer groups and herders and periods of downgrading, like we can see it today in modern Liberalcapitalistic societies.

    High energy input and high group selective pressure = Higher general potential
    Low energy input and low group selective pressure = Lower general potential - possibly degeneration.
    Magna Europa est patria nostra
    STOP GATS! STOP LIBERALISM!

  10. #10
    Member Klegutati's Avatar
    Join Date
    Mar 2006
    Last Online
    Sunday, April 1st, 2007 @ 02:24 AM
    Subrace
    Pontid and East-Baltid
    Country
    Dominion of Canada Dominion of Canada
    Location
    Over the Rocks
    Gender
    Family
    Open happy Relationship..
    Occupation
    Student
    Politics
    Liberal
    Religion
    Methodist (Christian)
    Posts
    296
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: Why Are Human Brains Getting Smaller?

    Maybe there is a link between the Y-chromosomem and the side of the brain. For men are getting smarter but the Y-chromosome is getting smaller.. HAHA

Similar Threads

  1. Replies: 2
    Last Post: Tuesday, April 13th, 2010, 06:09 PM
  2. Why Are Human Brains So Big?
    By Verðandi in forum Bio-Anthropology & Human Variation
    Replies: 0
    Last Post: Monday, July 13th, 2009, 04:20 PM
  3. [SOLVED] Americans Are Getting Smaller...
    By Franz in forum Health, Fitness & Nutrition
    Replies: 4
    Last Post: Friday, January 21st, 2005, 04:09 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •