Digital Dermatoglyphic Heritability Differences as Evidenced by a Female Twin Study

2010 ◽  
Vol 13 (5) ◽  
pp. 482-489 ◽  
Author(s):  
João Felipe Machado ◽  
Paula Roquetti Fernandes ◽  
Ricardo Wagner Roquetti ◽  
José Fernandes Filho
Keyword(s):  
Monozygotic Twins ◽  
Monozygotic Twin ◽  
Ridge Count ◽  
Left Hand ◽  
Pattern Frequency ◽  
Right Hand ◽  
Significant Heritability ◽  
Loop Pattern ◽  
Estimate Heritability ◽  
Dermatoglyphic Traits

The genetic and environmental contributions to determine digital dermatoglyphic traits were investigated by using female dizygotic and monozygotic twin pairs to estimate heritability indexes (h2). The evaluated sample was composed by 20 monozygotic twin pairs and 13 dizygotic twin pairs. A significant heritability (h2 = 0.65 to 0.96) was observed for 12 dermatoglyphic characteristics (delta indexes and ridge counts for right hand, left hand and both hands, and ridge counts for most individual fingers). A negative correlation between the ridge counts and heritability indexes from individual fingers was found for the left hand, which appears to be associated to a higher arch pattern frequency in most left-hand fingers, since this frequency was negatively correlated with ridge counts and positively correlated with heritability indexes. Heritability indexes of right-hand fingers were positively correlated with loop pattern frequency and negatively correlated with whorl pattern frequency. The low heritability of ridge counts from left thumb, ring and little fingers (h2 = 0.11 to 0.32) indicates a higher chance that the chorion type had an influence in the intra-pair variance of monozygotic twins. Results confirmed the predominant genetic influence on the total ridge count. The heritability indexes varied in up to 8 times between different fingers and its association to ridge counts and pattern frequency was very variable between hands, evidencing that the use of dermatoglyphic traits from individual fingers as indicators of genetic influences to other human traits should consider this variability.

scholarly journals Palm ridge density as anew identifier for age and sex in forensic medicine

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
K M Mohamed ◽  
E M F Gaballah ◽  
H S Zaghloul ◽  
M M Ismail
Keyword(s):  
Age Groups ◽  
Monozygotic Twins ◽  
Significant Negative Correlation ◽  
Ridge Count ◽  
Statistical Significant Difference ◽  
Left Hand ◽  
Right Hand ◽  
Significant Difference ◽  
Males And Females ◽  
Palm Print

Abstract Background Palm print recognition is a biometric technology which recognizes a person based on his/her palm print pattern. Palm print serves as a reliable human identifier because the print patterns are not duplicated in other people, even in monozygotic twins. More importantly, the details of these ridges are permanent Method: In the current study, The four prominent areas were analysed on the palm prints that included central prominent part of the thenar eminence (P1), hypothenar region; inner to the proximal axial triradius (P2), medial mount; proximal to the triradius of the second digit (P3) and lateral mount; proximal to the triradius of the fifth digit (P4). areas were taken, by inking method, from 200 healthy Egyptian subjects of different ages and both sexes (113 males and 87 females). Ridge count per 25mm2 was determined together with assessment of ridge pattern type. The subjects were divided into four age groups; from 6-<12, from 12-<18, from 18-<40 and ≥40 years Results Females had higher palm ridge density in all palm areas as well as total in both hands than males, there was a statistical significant difference in mean ridge density of individual palm areas as well as total of both hands, between different age groups within males and females separately (p < 0.001**), except in left P1 and P4 in females. There was a statistical significant negative correlation between the age and ridge density of the right hand p2, There was a highly statistical significant difference between the ridge density in the Left hand P3 and right hand p3 and between Left hand p4 and right hand p4 (p < 0.0001** for both) in both males and females but there was no statistical significant difference between Left hand P1 and right hand p1 as well as between the Left hand p2 and right hand p2 in both males and females, There was a highly statistical significant difference between all areas of right hand in both males and females (p < 0.05) There was a highly statistical significant difference between all areas of left hand in male and female except between left p4- p1 Conclusions In the current research, we were able to prove that palm prints ridge density can be help in gender and age identification.

Neurological soft signs and dermatoglyphic anomalies in twins with schizophrenia

2004 ◽  
Vol 19 (3) ◽  
pp. 159-163 ◽  
Author(s):  
Brendan D. Kelly ◽  
David Cotter ◽  
Cian Denihan ◽  
Deirdre Larkin ◽  
Peter Murphy ◽  
...  
Keyword(s):  
Neural Development ◽  
Monozygotic Twins ◽  
Ridge Count ◽  
Neurological Soft Signs ◽  
Environmental Event ◽  
Right Hand ◽  
Significant Difference ◽  
Discordant Twins ◽  
The Right

AbstractSchizophrenia is associated with altered neural development. We assessed neurological soft signs (NSS) and dermatoglyphic anomalies (total a–b ridge count (TABRC) and total finger ridge count) in 15 pairs of twins concordant and discordant for schizophrenia. Within-pair differences in both NSS and TABRC scores were significantly greater in discordant compared to concordant monozygotic pairs. There was no significant difference in NSS and TABRC scores between subjects with schizophrenia and their co-twins without the illness. However, monozygotic discordant twins with schizophrenia had higher ABRCs on their right hands compared to their co-twins without the illness. These findings suggest that an unidentified environmental event acting between weeks 6 and 15 of gestation affects the development of monozygotic twins who go on to develop schizophrenia but does not have a corresponding effect on their co-twins who do not develop the illness. The effect of such an event on dermatoglyphic profiles appears lateralised to the right hand in affected twins.

scholarly journals A Comparative Evaluation between Dermatoglyphic Patterns and the Permanent Molar Relationships – An Attempt to Predict the Future Malocclusions

2021 ◽  
pp. 10-17
Author(s):  
Vignesh R. ◽  
C. Vishnu Rekha ◽  
Sankar Annamalai ◽  
Parisa Norouzi ◽  
Ditto Sharmin
Keyword(s):  
Class Iii ◽  
Ridge Count ◽  
Chi Square ◽  
Exact Test ◽  
Left Hand ◽  
Permanent Molar ◽  
Right Hand ◽  
Pediatric Dentist ◽  
Chi Square Test ◽  
Little Finger

Background: Due to the similar duration of development, finding the dermatoglyphic patterns to predict malocclusions can help a pediatric dentist to attempt any necessary preventive and interceptive orthodontic therapies. Aim: To assess the correlation between different dermatoglyphic patterns with the permanent molar relationships. Materials and Methods: 300 children who are 14-16 years old with completely erupted 2nd permanent molars up to occlusal table were recruited and the pattern of molar terminal plane was recorded in the proforma. Finger prints of these subjects were recorded with ink and roller method. Forensic analyst analysed the prints and classified based on the classification given by Galton and also calculated the finger ridge count as given by Cummins and Midlo Statistical analysis used: Chi-Square test was applied to compare proportions between all the groups and also for gender comparison. Fisher’s exact test was used when any expected cell frequency of less than five were obtained. Paired t-Test and McNemar’s test were applied to compare values between right and left hand. Results: Class I children showed absence of arch pattern in thumb and little finger of left hand; and higher total finger ridge count in right hand when compared to left hand. Children with Class II molar relationship had a significant association with presence of arch pattern in thumb finger of left hand; and presence of whorl pattern in both left and right ring fingers. Class III had a significant association with presence of loop pattern in left thumb finger and little finger; absence of arch pattern in thumb of right hand. Conclusion: Dermatoglyphics can be a useful non-invasive analytical tool to predict malocclusions in permanent dentition and sometimes, to identify an individual. Further studies with larger sample size are required to provide an insight into its significant correlations.

A Comparative Analysis of Dermatoglyphic Traits on Patients with Chronic Kidney Disease

2018 ◽  
Vol 9 (06) ◽  
pp. 20479-20483
Author(s):  
Manandhar B ◽  
Raman R
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Control Group ◽  
Left Hand ◽  
Medical Disorders ◽  
Right Hand ◽  
Ulnar Loop ◽  
Ridge Pattern ◽  
Loop Pattern ◽  
The Right

Background: Dermatoglyphic features have been associated with numerous medical disorders.. This study is an effort to determine the association between dermatoglyphics and chronic kidney disease. Objectives:  To record and compare the dermatoglyphic pattern in patients of chronic kidney disease and in control group Methods: A case control descriptive study was conducted over six months period on 100 patients with chronic kidney disease and 100 individuals with no evidence of kidney disease in Hemodialysis Department of National Dialysis Centre situated in Kantipur General Hospital, Basundhara, Kathmandu.Patient’s hands were cleaned with soap and water. Once dried, black duplicating ink was applied on fingers and palm. Finger tips followed by palm were recorded on white A4 size paper. Frequency of each ridge pattern analysis was done and paired t-test was performed using SPSS version 16. Results: The distribution of frequency and percentage of ulnar loop pattern in right hand of patients with chronic kidney disease was 350(70%) whereas the distribution of ulnar loop pattern in left hand was 282(56.4%). Conclusion: The predominant fingerprint pattern in patients with chronic kidney disease was found as ulnar loop but the increased frequency of ulnar loop was recorded in right hand of chronic kidney disease patients as compared to the right hand of control group.

scholarly journals Heritability in genetic heart disease: the role of genetic background

Open Heart ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. e000929 ◽  
Author(s):  
Joeri A Jansweijer ◽  
Karin Y van Spaendonck-Zwarts ◽  
Michael W T Tanck ◽  
J Peter van Tintelen ◽  
Imke Christiaans ◽  
...  
Keyword(s):  
Cardiac Disease ◽  
Genetic Background ◽  
Interventricular Septum ◽  
Monozygotic Twins ◽  
Clinical Information ◽  
Monozygotic Twin ◽  
Genetic Modifiers ◽  
Clinical Expression ◽  
Significant Heritability ◽  
Structural Traits

BackgroundMutations in genes encoding ion channels or sarcomeric proteins are an important cause of hereditary cardiac disease. However, the severity of the resultant disease varies considerably even among those with an identical mutation. Such clinical variation is often thought to be explained largely by differences in genetic background or ‘modifier genes’. We aimed to test the prediction that identical genetic backgrounds result in largely similar clinical expression of a cardiac disease causing mutation, by studying the clinical expression of mutations causing cardiac disease in monozygotic twins.MethodsWe compared first available clinical information on 46 monozygotic twin pairs and 59 control pairs that had either a hereditary cardiomyopathy or channelopathy.ResultsDespite limited power of this study, we found significant heritability for corrected QT interval (QTc) in long QT syndrome (LQTS). We could not detect significant heritability for structural traits, but found a significant environmental effect on thickness of the interventricular septum in hypertrophic cardiomyopathy.ConclusionsOur study confirms previously found robust heritability for electrical traits like QTc in LQTS, and adds information on low or lacking heritability for structural traits in heritable cardiomyopathies. This may steer the search for genetic modifiers in heritable cardiac disease.

DIGITAL AND PALMER DERMATOGLYPHIC CHARACTERISTICS OF THE IJAW ETHNIC GROUP

2016 ◽  
Vol 2 (1) ◽  
pp. 25
Author(s):  
Tarimobo Michael OTOBO ◽  
Rugina TARIMOBO-OTOBO
Keyword(s):  
Ethnic Group ◽  
Male Counterpart ◽  
Ridge Count ◽  
Radial Loop ◽  
Pattern Frequency ◽  
Ulnar Loop ◽  
Loop Pattern ◽  
Digital Pattern ◽  
And Gender ◽  
Gender Asymmetry

Introduction: Dermatoglyphics refers to the study of naturally occurring ridge on the planter surface of hand and foot of primates and other animals. Dermatoglyphics is a polygenic trait and is not duplicated among species even among monozygotic twins.The Ijaw’s are located predominately in the Niger Delta with fishing as their main stay of economy.Aim:  To determine the frequency distribution and gender differences of dermatoglyphic patterns of the Ijaw ethnic group in Nigeria.Methodology:  A total of 500 subjects were randomly selected to establish their digital and palmer dermatoglyphics by counting and classifying their ridge patterns based on standard technique.Results: The highest dermatoglyphic pattern frequency was radial loop (RL) 2.7±1.22, with least occurrence of ulnar loop pattern (UL) 1.37±0.60. There were no significant total finger ridge count (TFRC) and pattern intensity indices (PII) between sex P>0.05. Female subject had a significantly higher mean ATD angle and a-b ridge count than their male counterpart P <0.05.Discussion: There was a prevalence and elevated total frequency of radial loop and a diminution of whorl digital dermatoglyphic patterns; this finding is unique for this study population since most African studies among Nigeria ethnic group has ulnar loop as a predominate digital pattern. Also, sexual dimorphism was shown to exists in total finger ridge count (TFRC) and pattern intensity indices (PII) among the sampled subjects, however female subjects were reported to have higher mean ATD angle and a-b ridge count when compared to their male counterpart, this was statistically significant at P<0.05.Conclusion: This study has reported pattern frequency and gender asymmetry of digital and palmer dermatoglyphics traits of the Ijaw ethnic group. 

Editorial Note

1946 ◽  
Vol 11 (1) ◽  
pp. 2-2
Keyword(s):  
Editorial Note ◽  
Speech Sounds ◽  
Left Hand ◽  
Hand Column ◽  
Right Hand ◽  
Infant Speech ◽  
The Right

In the article “Infant Speech Sounds and Intelligence” by Orvis C. Irwin and Han Piao Chen, in the December 1945 issue of the Journal, the paragraph which begins at the bottom of the left hand column on page 295 should have been placed immediately below the first paragraph at the top of the right hand column on page 296. To the authors we express our sincere apologies.

Alive Still

2019 ◽  
Author(s):  
Cathy Curtis
Keyword(s):  
New York ◽  
Modern Art ◽  
Severe Form ◽  
The Other ◽  
Left Hand ◽  
Right Hand ◽  
The 1950S ◽  
Village Voice

In 1942, at age twenty, after a vision-impaired and rebellious childhood in Richmond, Virginia, Nell Blaine decamped for New York. Operations had corrected her eyesight, and she was newly aware of modern art, so different from the literal style of her youthful drawings. In Manhattan, she met rising young artists and poets. Her life was hectic, with raucous parties in her loft, lovers of both sexes, and freelance design jobs, including a stint at the Village Voice. Initially drawn to the rigorous formalism of Piet Mondrian, she received critical praise for her jazzy abstractions. During the 1950s, she began to paint interiors and landscapes. By 1959, when the Whitney Museum purchased one of her paintings, her career was firmly established. That year, she contracted a severe form of polio on a trip to Greece; suddenly, she was a paraplegic. Undaunted, she taught herself to paint in oil with her left hand, reserving her right hand for watercolors. In her postpolio work, she achieved a freer style, expressive of the joy she found in flowers and landscapes. Living half the year in Gloucester, Massachusetts, and the other half in New York, she took special delight in painting the views from her windows and from her country garden. Critics found her new style irresistible, and she had a loyal circle of collectors; still, she struggled to earn enough money to pay the aides who made her life possible. At her side for her final twenty-nine years was her lover, painter Carolyn Harris.

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