On a small proportion of hands, the heart line, and head line appear to be joined into a single line, forming one long line across the palm, known as the Simian line, or crease.
The association of this line was once thought only to be with chromosomal disorders such as Down syndrome. However, it is mostly considered a regular feature. In some recent studies, it is believed to show forms of neuroticism, hyperactivity, introversion, and sometimes delinquent behaviour.
While these attributes may relate to some of the people involved in the survey, they have also found that this line on someone with no physical defects or other behavioural problems, signifies a somewhat different, quite intense character; not necessarily a negative attribute as it would seem.
The owner of a Simian line 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.