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They also supposed that "Mongoloid" facial features reduce the surface area of the nose by having nasal bones that are flat against the face and having enlarged cheekbones that project forward which effectively reduce the external projection of the nose. [45]
[5] [6] [7] Due to his perception that these children shared facial similarities with the populations that German physician Johann Friedrich Blumenbach described as the "Mongolian race", Down used the term "mongoloid" in his characterisation of these patients. [8] [2] The term continued its usage into the 20th century.
An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.
Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features.
By the 19th century, however, scientific racism was favoring a classification of Austronesians as being a subset of the "Mongolian" race, as well as polygenism.The Australo-Melanesian populations of Southeast Asia and Melanesia (whom Blumenbach initially classified as a "subrace" of the "Malay" race) were also now being treated as a separate "Ethiopian" race by authors like Georges Cuvier ...
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Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin.The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. [6]
Facial features such as almond-shaped eyes (supposed feature of Chinese origin) and prominent lips (supposed feature of African origin) are put forward as proof by supporters of alternative origins. Both almond-shaped eyes and snarled mouths are characteristic of the were-jaguar motif common in Olmec art.