Video: the simian line in science & palmistry
- NORMAL HAND LINES - vs. - THE SIMIAN LINE -
SIMIAN LINE INDEX:
INTRO: About the Simian Line (a.k.a. 'simian crease')
• HOW TO RECOGNIZE a 'complete' Simian Line?
• WHY PALM CREASE NAMED the Simian Line?
• BRIEF HISTORY of the Simian Line
• ETHNIC POPULATIONS & the Simian Line
• MEDICAL PROBLEMS & the Simian Line
• PSYCHOLOGY & the Simian Line
• PROJECTS related to the Simian Line
• SYNONYMS for the Simian Line
• FAMOUS Simian Line holders
SIMIAN LINE & DIAGNOSTICS:
• The Simian Line in DOWN SYNDROME!
• The Simian Line in FRAGILE X SYNDROME!
_(In autism 2% to 6% have Fragile X syndrome!)
MORE HAND DIAGNOSTICS:
• The hand lines (palmar creases)
• The Sydney line
• The Hypothenar whorl
• The 5th finger (pinky)
• The fingernail tutor
ABOUT THE USE OF THE FAMOUS 'SINGLE PALMAR CREASE' AS A NOTORIOUS MARKER IN HAND DIAGNOSTICS
Next to many classic medical problems that have been linked with the simian line, it appears also linked with quite a few topics of human psychology. These varying from severe psychological problems to less common observation that the simian line can also be recognized as a 'gift marker' (which could apply to the many famous people who have a simian line).
In multiple studies the simian line has been linked with various aspects of psychological- and/or psychiatric problems, such as (in alphabetic order): deliquent behavior, hyperactivity, neuroticism, and schizophrenia.
Deliquent behavior:
R.S. Bali devoted in his book ""Anthropology of Crease morphogenisis" (1994) a full chapter about the behavioural attributes of palm creases. Various studies have indicated that the simian crease (or a 'single radial base crease') is more often seen in the hands of criminals, juvenile deliquents, and even murderers.
In the same year a very interesting pioneering study was presented by Ramesh Chaube (in: "Application and Methodological Perspectives in Dermatoglyphics", 1971), which revealed that the 'single radial transverse crease' (which includes the 'complete' simian line + some of it's related variants) is much more often seen in the hands of various types of criminals (29.25% vs. 11.81% in controls).
Hyperactivity:
A study by Robert J. Lerer who found: "... the incidence of simian and Sydney palmar creases was 2 to 3 times higher in the hyperactive children population than in the controls." This pattern was slightly stronger for the simian crease than the Sydney line, but was significant in boys as well as girls.
Neuroticism:
The author of this website (handresearch.com) presented a few years ago some findings which indicate that so-called 'simian-related heartlines' (see the 3 pictures below) appear to be linked with one of the Big Five personality dimensions: in a small sample (4 males, 11 females) of people with a 'simian-related heartline' a high percetage appeared to have HIGH score on the Big Five dimension NEUROTICISM (when males & females grouped together: the result is significant at p<0.005).
NOTICE: In the BIG FIVE model the personality trait NEUROTICISM is associated with the tendency to experience negative emotions, especially related to: anxiety, hostility, depression, self-consciousness, impulsiveness, and vulnerability to stress.
Photos below are examples of simian line 'variants' ('click' for larger version):
Especially the work of the Polish psychologist Charlotte Wolff should be mentioned in this perspective. Wolff's research results on the simian crease in schizophrenic patients has been confirmed in quite a few studies - but also quite a few other studies have not confirmed the significance of the simian line in schizophrenia.
American hand analyst Ed Campbell describes in his book 'The Encyclopedia of Palmistry' a well researched introduction towards the most common interpretations that have been described in the palmistry literature regarding the simian line. Jenifer Boyer presents an online overview of how palm readers & hand analysts interpretate the simian line - see also: Jeff Overturf's tribute to the simian line.
According various authors of palmistry books, some common personality features of 'healthy people' that have been associated with the simian line are e.g.: 'individualistic and emotional irregular' (chinese palmist Hachiro Asano
),
'highly introspective' (Indian palmist V.A.K. Ayer 
),
'emotional extremes' (UK palmists Sasha Fenton 
& Malcolm Wright ),
'intense powers of concentration' (Canadian palmist Roz Levin 
),
'egocentricity' (Indian palm reader K.C. Sen ),
'gift marker' (US hand analyst Richard Unger 
),
and 'difficulty in getting along with others' (Malaysian palmist Yaschpaule 
).
And some palm reading & hand analysis experts from the 'Global Palm Reader Network' present some interesting articles about the simian line on their websites:
Jena Griffiths presents: The simian crease
Kenneth Lagerstrom presents: The simian line
Larry Rodrigues presents: About the simian line
Lynn Seal presents: About hands: simian line
Batya Weinbaum presents: The simian line
Would you like to contact people who have simian lines? In 2010 there are various excellent online opportunities: ...more.