The simian line is also known as:

Across The Parish Line

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What is in 2016 the state of knowledge about simian lines? .

On occasion this line can be related to a serious genetic abnormality, such as down syndrome. The scientific work in regard to the relationship between the Simian line and congenital research is quite extensive. Purvis-Smith in the Australian Paediatric Jounal (1972) wrote an article on his research between the relationship of down syndrome dermatogram. He concluded that there was a close relationship between presence of the Simian Line and the disease.

The Single Palmar Crease or Simian Line is the name given to the joining of the heart line and head line. The quadrangle area between the Head Line and Heart Line is lost in such a hand. This line signifies that the bearers emotions and mental powers are blended together. Normally, such a person will take things to extreme, they are intensive. Alternative names for this line are the simian crease, transverse palmar crease and simian fold.

Recommended if you have a Simian Line: .

Armin van Buuren, left: complete simian line (right: normal)
Trance DJ: world's most popular DJ (2007-2010)

Flickr: The Simian Line Pool

I think you took me too seriously, I was being funny. I wouldn't do that to a kid, like blame them for something just because they have a simian, I was merely making one gesture that this boy has sneaky ways about him unlike my other 6 kids. And he is different to the others in many ways, I'm not saying he is bad or saying people with simians are bad, you have me completely misunderstood. I have seen many simian line people who are very successful and very focused on their life, as is the boy I referred to.

That was my comment actually. And, it was an attempt to take the focus away from simian holders and to point out how the use of statistics can often be poorly applied. Everyone knows that good moms always, always know when you are 'being sneaky' no matter if you have simian lines or not.