Most people have three strong lines (called palmar flexion creases) in the palms of their hands. Palmar creases develop while a baby is in the womb (usually by week 12 gestation).
A Single Palmar Crease is a single line that runs across the palm of the hand; the horizontal creases join together to form a single one.
This used to be called a 'Simian Crease' but that carried a negative connotation (as it refers to a monkey or ape).
Some Interesting Facts:
- The Single Palmar Crease occurs in 1 out of 30 individuals.
- Males are twice as likely as females to have it.
- Single palmar creases usually indicates a problem with development.
- The Single Palmar Crease is more prevalent in individuals with: hyperactivity (2-3x more), neuroticism, delinquent behavior, and schizophrenia.
- About 45% of people with Down Syndrome have the Single Palmar Crease; Compare that to 1% of the general population.
Josiah is one of the 55% of children with Down Syndrome who does NOT have the Single Palmar Crease.
Famous People that have the Single Palmar Crease (or close variation):
Albert Einstein
Muhammad Ali
Tony Blair
Hillary Clinton
Robert DeNiro
This adventure is amazing....we learn something new every day :)
I love that you included the famous people who have the crease. :-D My son, Kheaven, is almost four, and also is one of the 55% of people with Ds who do NOT have it.
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