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- Developments (3/5) -
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The discovery made by R.L. Down is related to the fact that the human simian crease is observed in the hands of only 1% to 5% of white people.
However, the simian crease is very frequently observed in the hands of people who have Down's syndrome.
Research programs show results varying from 31% to 86%.1
One should notice that the simian crease is more frequently observed in some other (non-white) populations.
About 10% of the asian population has a simian crease, and studies in the hands of African pygmies have shown percentages close to 30%.2
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In the beginning of the 20th century biologists and anthropologist got excited to study the dermatoglyphics and the palmar creases.
And nowadays the dermatoglyphics are known as the most important aspect of the human body to study genetic and biological differences
among different populations. - The following will show that next to Down's syndrome the simian crease is very frequently seen in other (genetic) disorders. And the section NEUROTICISM presents new research results relating the simian crease to the human psychology of 'healty' people. |
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