Simian Crease the Single Horinzontal Palm Line.

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Simian Crease on the Palm

On a small proportion of hands, the heart line (distal transverse crease), and head line (proximal transverse crease) appear to be joined into a single line. One long line across the palm is the Simian crease. In some cases, the crease is present together with the head or heart line; a variation of the Simian crease. (read more below about the Suwon and Sydney crease).

Simian crease and chromosomal disorders?

This line was once thought only to be with chromosomal disorders such as Down syndrome. The crease has also been associated with fetal alcohol syndrome, Aarskog syndrome (a rare condition recognized by short stature and multiple face, leg, arm or genital abnormalities). It’s now mostly inherited and considered a regular feature. The Simian line is more frequent on males and tends to run in families, and not all have it on both hands. It is also more common on Asians and native Americans.

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See a video lesson about the Simian line here.

Because the emotion line and the practical thinking line are together as one, the person might be intense in their feeling or thought. The owner of a Simian crease can possess great potential for strong will and focus, many of whom are ambitious and driven. Primarily if they have found their niche and had opportunities in their life regarding education and family support.

Simian crease on both hands

When there is a Simian crease on both hands, it depicts someone with a lot of energy or enthusiasm. These are passionate people who might be a bit too much for the ordinary folk. The bursts of energy may come in stages of ‘full-on’ or ‘full-off’. So they might discover their passion and go for it, ‘all in’. If confronted with an obstacle, it might be an instant ‘all out’. However, to hypothesize about this crease, compare other features of the hand, such as hand shape, finger length, thumbs, and lines; including fingerprint and palm patterns.



There are many variations of the Simian line such as the Suwon crease. With a Suwon crease there is a heart line all the way across the palm or second section of a head line to the heart line. This type of line might depict a person who is quite demanding in matters of love and expect a lot from their partner. Money is usually significant; hence they are liable to put work before relationships. If you need more information on this, please join our group here:

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The Sydney line which is a head line that crosses the palm, but a heart line is still present. These variations are a little more complicated in their meaning. There may be pressure on the emotions or mental capacity, and so the individual tends to over-analyze feelings or thoughts. The positive side to it is that they can absorb much of the information, thus making top researchers. Read more details about the Sydney and Suwon crease in this article.

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