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Thread: Racial determination by hair texture according to FBI3650 days old

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    Default Racial determination by hair texture according to FBI

    Quote Originally Posted by FBI.gov

    Caucasian or European hair


    Mongoloid or Asian hair


    Negroid or African hair


    Racial Determination
    A human hair can be associated with a particular racial group based on established models for each group. Forensic examiners differentiate between hairs of Caucasoid (European ancestry), Mongoloid (Asian ancestry), and Negroid (African ancestry) origin, all of which exhibit microscopic characteristics that distinguish one racial group from another. Head hairs are generally considered best for determining race, although hairs from other body areas can be useful. Racial determination from the microscopic examination of head hairs from infants, however, can be difficult, and hairs from individuals of mixed racial ancestry may possess microscopic characteristics attributed to more than one racial group.
    The identification of race is most useful as an investigative tool, but it can also be an associative tool when an individual's hairs exhibit unusual racial characteristics.

    Caucasoid (European)
    Hairs of Caucasoid or Caucasian origin can be of fine to medium coarseness, are generally straight or wavy in appearance, and exhibit colors ranging from blonde to brown to black. The hair shafts of Caucasian hairs vary from round to oval in cross section and have fine to medium-sized, evenly distributed pigment granules.

    Mongoloid (Asian)
    Hairs of Mongoloid or Asian origin are regularly coarse, straight, and circular in cross section, with a wider diameter than the hairs of the other racial groups. The outer layer of the hair, the cuticle, is usually significantly thicker than the cuticle of Negroid and Caucasian hairs, and the medulla, or central canal, is continuous and wide. The hair shaft, or cortex, of Mongoloid hair contains pigment granules that are generally larger in size than the pigment granules of Caucasian hairs and which often appear to be grouped in patchy areas within the shaft. Mongoloid hair can have a characteristic reddish appearance as a product of its pigment.

    Negroid (African)
    Hairs of Negroid or African origin are regularly curly or kinky, have a flattened cross section, and can appear curly, wavy, or coiled. Negroid pigment granules are larger than those found in Mongoloid and Caucasian hair and are grouped in clumps of different sizes and shapes. The density of the pigment in the hair shaft may be so great as to make the hair opaque. A Negroid hair shaft exhibits variation or apparent variation in diameter because of its flattened nature and the manner in which it lies on the microscope slide. Twisting of the hair shaft, known as buckling, can be present, and the hair shaft frequently splits along the length.
    Source: http://www.fbi.gov/hq/lab/fsc/backis...0Determination
    Quote Originally Posted by FBI.gov
    Biological or Environmental Alteration

    The microscopic appearance of hairs is affected by natural biological fluctuations and environmental influences. For this reason, it is important that known hair standards are collected contemporaneously to the deposition of questioned hairs. Head hairs are most affected by these factors, whereas pubic hairs are less influenced. A time period of several months to years can detract from a meaningful head hair comparison, whereas several years may not severely impact on meaningful pubic hair comparisons.
    When hairs originate from a body in a state of decomposition, a dark band may appear near the root of the hair. This characteristic has been labeled a postmortem root band.


    A postmortem root band
    Source: http://www.fbi.gov/hq/lab/fsc/backis...l%20Alteration
    Hair types
    The range of different types of hair is enormous, ranging from tight wiry curls to ruler-straight. The color and shape of hair vary too. What accounts for these differences?
    The type of hair you have is inherited from your parents. We may look back further, and say that it is determined by the part of the world in which your ancestors originated. It all depends on the race, or mixture of races, from which they came. In the very earliest days of human evolution, three basic racial groups of people seem to have existed on this planet. These spread out across the world and became mixed together. They are especially well mixed in countries where there has been massive immigration, such as the U.S.A. over the last few hundred years.
    Scientists have identified three basic types of hair in today's human population, and have related them to these three early races:
    Asian, Caucasoid and African.
    The three types of hair not only look quite different, but the differences in their responses to physical and chemical damage can be remarkable.
    Asian
    These are people from the Orient, for example from China and Japan. Their hair is very straight, and always black in color.

    Caucasoid
    The Caucasoid group is the most 'varied' of the three racial groups. Modern Caucasoids are very varied, even though they are descended from the same group of ancestors. They range from the fair-skinned people of north-west Europe to the widely varying peoples of the Indian subcontinent. Their hair may be either wavy or straight, and the diameter varies widely too. The color ranges from black to a pale blond that is almost white, including just about every possible shade in between.

    African
    African people originated in Africa. Their hair is black and tightly curled. It tends to be woolly and dry, and is extremely easily damaged by heat or chemicals.

    Asian hair is straight and thick, and resists damage well Caucasoid hair can be anything from blond to black in color, and may be curly, wavy or straight African hair is vulnerable to damage, because of its shape and twisted structure
    Source: http://www.pg.com/science/haircare/hair_twh_37.htm (seems to be defunct now)

    Questions: how exactly is African hair "vulnerable to damage"? And what makes Asian hair more resistant to damage? How did these differences evolve and what came first: straight Europoid hair or curly African hair? It seems to me that archaic Homo Sapiens had straight hair of some sort, before it evolved in sub-Saharan Africa to the curly type of hair we see there today. What's your take on this?

    Please post more studies, links and articles about racial hair difference, if you have any interesting and useful information.
    Last edited by EliasAlucard; 2009-10-23 at 20:01.
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    Quoted for truth:
    Quote Originally Posted by Alaron View Post
    Anatolian Urhemait supporters are mostly butthurt Meds.
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    Quote Originally Posted by drgs View Post
    Poland is a misunderstanding. It is a country which lies on the frontier between western and slavic world, and which combines elements of both.
    In fact, they are not even the Europeans in strict sense, meaning European as in bearing the responsibility and understanding of European interests. Poland has always been an subordinate country, on one side sucking German dick, on the other side -- Russian one, some kind of "novice" europeans, who are full of inferiority complexes, hysteria and obsessity neuroses. This is also true for all Baltic countries

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    Quote Originally Posted by EliasAlucard View Post
    Questions: how exactly is African hair "vulnerable to damage"? And what makes Asian hair more resistant to damage?
    Hair resistance is likely related to thickness.

    Quote Originally Posted by EliasAlucard View Post
    How did these differences evolve and what came first: straight Europoid hair or curly African hair? It seems to me that archaic Homo Sapiens had straight hair of some sort, before it evolved in sub-Saharan Africa to the curly type of hair we see there today. What's your take on this?
    African primates have straight hair, so I think archaic Homo Sapiens had straight hair too.

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    Quote Originally Posted by Cinnabar View Post
    Hair resistance is likely related to thickness.
    How so? I've been told it's the hair follicle (and its vitality) that determines the strength of the hair.
    Quote Originally Posted by Cinnabar View Post
    African primates have straight hair, so I think archaic Homo Sapiens had straight hair too.
    Yes, this seems to be the most likely explanation. Pretty much all Eurasians have either straight or wavy (slightly curly) hair. Even Amerindians have straight/wavy hair. Neither west nor east Eurasians, have curly hair similar to Negroid popcorn hair texture.

    It seems so, that sub-Saharan Africans at some point, went their own evolutionary way as far as their hair texture is concerned.

    We do not see other non-human primates with the kind of curly hair texture found in SSAs. But what kind of natural selection (or possibly sexual selection?) prompted this type of hair development in Africa south of the Sahara desert?
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    “A wise man makes his own decisions; an ignorant man follows public opinion.” ― Chinese proverb

    “Every decent man is ashamed of the government he lives under.” ― H. L. Mencken

    “The only good is knowledge and the only evil is ignorance.” ― Socrates

    “Damnant quod non intelligunt.” ― Latin proverb

    Quoted for truth:
    Quote Originally Posted by Alaron View Post
    Anatolian Urhemait supporters are mostly butthurt Meds.
    For the lulz:
    Quote Originally Posted by drgs View Post
    Poland is a misunderstanding. It is a country which lies on the frontier between western and slavic world, and which combines elements of both.
    In fact, they are not even the Europeans in strict sense, meaning European as in bearing the responsibility and understanding of European interests. Poland has always been an subordinate country, on one side sucking German dick, on the other side -- Russian one, some kind of "novice" europeans, who are full of inferiority complexes, hysteria and obsessity neuroses. This is also true for all Baltic countries

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    Tightly coiled hair is found outside of Africa, its found in Melanesians, Solomon Islanders, Andaman Islanders and Papua New Guineas and Negritos.

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    Quote Originally Posted by Game Theory View Post
    Tightly coiled hair is found outside of Africa, its found in Melanesians, Solomon Islanders, Andaman Islanders and Papua New Guineas and Negritos.
    Yes, it seems to be there with Oceanians as well. But in their case, it's not as curled to the extreme degree of SSAs. It would be interesting to know the more about the specific hair genes which caused these deviations in human hair texture.

    By the way, the environment (nature/nurture) seems to also have an effect on your hair, which means hair texture isn't strictly genetic:

    Choice of dietary protein of vegetarians and omnivores is reflected in their hair protein 13C and 15N abundance: http://www.ncbi.nlm.nih.gov/pubmed/15880664
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    “A wise man makes his own decisions; an ignorant man follows public opinion.” ― Chinese proverb

    “Every decent man is ashamed of the government he lives under.” ― H. L. Mencken

    “The only good is knowledge and the only evil is ignorance.” ― Socrates

    “Damnant quod non intelligunt.” ― Latin proverb

    Quoted for truth:
    Quote Originally Posted by Alaron View Post
    Anatolian Urhemait supporters are mostly butthurt Meds.
    For the lulz:
    Quote Originally Posted by drgs View Post
    Poland is a misunderstanding. It is a country which lies on the frontier between western and slavic world, and which combines elements of both.
    In fact, they are not even the Europeans in strict sense, meaning European as in bearing the responsibility and understanding of European interests. Poland has always been an subordinate country, on one side sucking German dick, on the other side -- Russian one, some kind of "novice" europeans, who are full of inferiority complexes, hysteria and obsessity neuroses. This is also true for all Baltic countries

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    Quote Originally Posted by Game Theory View Post
    Tightly coiled hair is found outside of Africa, its found in Melanesians, Solomon Islanders, Andaman Islanders and Papua New Guineas and Negritos.
    It is and some Jarawa/Andaman Islanders have hair similar to the Khoisan. Who have hair describe as ''peppercorn'' according to my encyclopedia.

    Jarawa

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    Quote Originally Posted by EliasAlucard View Post
    Yes, it seems to be there with Oceanians as well. But in their case, it's not as curled to the extreme degree of SSAs. It would be interesting to know the more about the specific hair genes which caused these deviations in human hair texture.

    By the way, the environment (nature/nurture) seems to also have an effect on your hair, which means hair texture isn't strictly genetic:

    Choice of dietary protein of vegetarians and omnivores is reflected in their hair protein 13C and 15N abundance: http://www.ncbi.nlm.nih.gov/pubmed/15880664
    So called "nappy hair" comes in many gradations, to very tightly curled[peppercorn] to fine textured, there is no one uniform type of nappy hair.

    http://www.naturallycurly.com/hair-types

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    Quote Originally Posted by Game Theory View Post
    So called "nappy hair" comes in many gradations, to very tightly curled[peppercorn] to fine textured, there is no one uniform type of nappy hair.

    http://www.naturallycurly.com/hair-types
    Wikipedia has an interesting article about this:

    http://en.wikipedia.org/wiki/Afro-textured_hair
    ReactOS <--- support this project so that we can get rid of Windows!
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    “A wise man makes his own decisions; an ignorant man follows public opinion.” ― Chinese proverb

    “Every decent man is ashamed of the government he lives under.” ― H. L. Mencken

    “The only good is knowledge and the only evil is ignorance.” ― Socrates

    “Damnant quod non intelligunt.” ― Latin proverb

    Quoted for truth:
    Quote Originally Posted by Alaron View Post
    Anatolian Urhemait supporters are mostly butthurt Meds.
    For the lulz:
    Quote Originally Posted by drgs View Post
    Poland is a misunderstanding. It is a country which lies on the frontier between western and slavic world, and which combines elements of both.
    In fact, they are not even the Europeans in strict sense, meaning European as in bearing the responsibility and understanding of European interests. Poland has always been an subordinate country, on one side sucking German dick, on the other side -- Russian one, some kind of "novice" europeans, who are full of inferiority complexes, hysteria and obsessity neuroses. This is also true for all Baltic countries

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    Very interesting. I wonder, is the hair of Native Americans indistinguishable from that of East Asians? Is there any difference between Amerindian ethnic groups?

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    Quote Originally Posted by EliasAlucard View Post
    Yes, it seems to be there with Oceanians as well. But in their case, it's not as curled to the extreme degree of SSAs. It would be interesting to know the more about the specific hair genes which caused these deviations in human hair texture.
    There is quite some variety within both groups, though I'd say SSA's have more tightly coiled hair on average. Australian aboriginals have a noticeably different texture from Papuans, from what I've seen. The Australians pretty much had curly hair, whereas Papuans had more kinky hair, and I'm sure Melanesians in general have those and everything in between.

    I'd love to see an updated hair texture map of the world.

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