Sex differences in frequencies of dermatoglyphic patterns by individual fingers

Králík, Miroslav; Polcerová, Lenka; Čuta, Martin

doi:10.1080/03014460.2019.1622778

Cited by 7 publications

(7 citation statements)

References 40 publications

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“…It is worth mentioning that in our study, a higher number of dimorphic radioulnar contrasts and, at the same time, higher values of their effects of sex differences were observed on the right hand. This result is consistent with a number of other findings on the limbs, both in anthropometric features, for example, skeleton (Králík, Urbanová, et al, 2014), in hand morphometry, for example, hand size, as well as in dermatoglyphic features, for example, frequency of whorls on the fingers of the hand (Králík, Polcerová, et al, 2019). Similarly, a higher sex difference was also observed in the right hand 2D:4D ratio (Hönekopp & Watson, 2010).…”

Section: Discussionsupporting

confidence: 91%

“…Moreover, given the possible reaction of hormonal milieu-including sex hormonesto external/environmental factors population diversity in sex differences of other dermatoglyphic features could be substantial modifiers. For instance, the above mentioned sex differences in frequencies of whorl patterns increased significantly from radial to ulnar fingers and this increase changed with geographical latitude (Kr alík, Polcerov a, et al, 2019). Therefore, it is important to specify the role of external factors in dermatoglyphic variations if dermatoglyphic features are to be used as prenatal developmental markers in prenatal sex development.…”

Section: Introductionmentioning

confidence: 99%

“…Significant sex differences are known for many dermatoglyphic features (Cummins & Midlo, 1943; Schwidetzky & Jantz, 1977, 1979), and given the known ontogeny of dermatoglyphic structures, they must be established and fixed prenatally. On the one hand, sex differences might be strongly conservative, for instance populationwide sex differences in frequencies of dermatoglyphic whorl patterns on the 4th finger on the right hand were found to be statistically almost identical across hundreds of human populations (Králík, Polcerová, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Radioulnar contrasts in fingerprint ridge counts: Searching for dermatoglyphic markers of early sex development

Polcerová

Chovancová

Králík

et al. 2021

American J Hum Biol

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Objectives Using prenatally fixed dermatoglyphics features as markers of prenatal sex development is limited due to insufficient knowledge on their sex differences. This study aims to examine more thoroughly sex differences in radioulnar contrasts. Methods Fingerprints of 360 females and 331 males from four samples of different ethnic backgrounds (Czechs, Slovaks, Vietnamese and Lusatian Sorbs) were studied. On both hands, finger ridge counts were recorded, and all possible radioulnar contrasts were computed as a difference between ridge count at a radial position minus ridge count at a respective ulnar position on the hand. Radioulnar contrasts with population‐congruent and numerically large dimorphism were selected and the dimorphism of the selected radioulnar contrasts was then tested using nonparametric analysis of variance. Results Greater dimorphism of radioulnar contrasts occurred on the right hand than on the left hand. Population congruent direction and relatively strong dimorphism (Cohen’s d greater than 0.3) was found in six radioulnar contrasts on the right hand, all of which involved the radial ridge count of the 2nd finger. Of these, the highest average dimorphism was observed for the difference between the radial ridge count of the 2nd finger and the ulnar ridge count of the 4th finger (2r4u contrast), where the average effect size from all four population samples was comparable to a published average effect size of the 2D:4D finger length ratio. Conclusion We propose that 2r4u contrast of ridge counts could serve as a marker of prenatal sexual development targeting a temporally narrow developmental window.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radioulnar contrasts in fingerprint ridge counts: Searching for dermatoglyphic markers of early sex development

Polcerová

Chovancová

Králík

et al. 2021

American J Hum Biol

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“…When the sample was analyzed considering both genders, the higher the BMI child the greater the number of ridges in MESQL1 (left thumb) and MDSQL1 (right thumb). However, considering that men and women have different dermatoglyphic patterns [ 30 , 31 ], when the sample was analyzed according to the gender only the male individuals showed a significant difference in the MDSQL1 finger (right thumb), i.e., the greater the number of ridges, the greater the BMI. There was a relationship between BMI and MDT1 fingerprint pattern in male individuals, with a higher frequency of the ulnar loop (UL) pattern in the obese group.…”

Section: Discussionmentioning

confidence: 99%

Association between gestational period and obesity in children with the use of dermatoglyphic traits: A preliminary study

Alberti

Traebert

et al. 2021

PLoS ONE

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Events occurring during the gestational period can influence the development of diseases and conditions such as obesity. This study aimed to analyze the association between events occurring in the gestational period and the occurrence of obesity in children based on dermatoglyphic traits. The sample comprised 73 children born in 2009, living in Palhoça, Santa Catarina (SC), Brazil, regularly enrolled in public and private schools in that municipality and who are participants of an ongoing major cohort study project called Coorte Brasil Sul. The results show predictive traits of obesity when comparing BMI and fingerprint groups. Obese male group, presented the figure Ulnar Loop (UL) in the right hand (MDT1) thumb and greater number of ridges in the (MDSQL1) right thumb the greater the BMI; likewise, the older the woman getting pregnant the greater the number of ridges that the child presented in the (MESQL2) left index finger and (MESQL1) right thumb. The results obtained infer the presence of predictive traits of BMI ranges and a possible association between the dermatoglyphic traits of children with obesity and late pregnancy women.

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“…Meta-analysis of radioulnar contrasts in dermatoglyphic ridge-counts between individual fingers Dermatoglyphics can draw from experience and the results of more than a hundred years of studies. Meta-analytic aggregations and comparisons of a large number of studies allow both to distinguish erroneous results from the biologically plausible major trends and to generate higher-level views of a multi-population nature, to study e.g., geographic gradients (e.g., Králík et al 2019), dependence on climatic factors (e.g., Bhasin 2007;Rosa 1985), that are not possible in single population studies and limited samples. However, the use of published data in meta-analysis depends on the numerical nature of the secondary data that are published.…”

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confidence: 99%

Meta-analysis of radioulnar contrasts in dermatoglyphic ridge-counts between individual fingers

Polcerová¹,

Králík²,

Meinerová³

et al. 2022

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Radioulnar contrasts (numerically: differences) between ridge counts of individual fingers of the human hand have been identified as promising features in respect to prenatal signalling. In this study, we compared the results of a meta-analysis of intersex differences in radioulnar contrasts between published mean values of dermatoglyphic ridge counts on the fingers of the hand (calculated from the higher RC of each finger) with intersex differences obtained from radioulnar contrasts already calculated at the individual level.Searching the NCBI-PMC, ScienceDirect databases, and archival resources, we found a total of 273 dermatoglyphic studies (after merging duplicates in databases). However, only 11 of those studies were suitable for meta-analysis after application of all selection criteria, including our own four studies. Considering the effort spent in searching for articles, we were able to find very few studies that published statistical parameters of ridge counts by individual finger and that would thus be suitable for studying contrasts between fingers. When statistical parameters have been published for individual fingers, they did not represent the descriptions of all ridge counts from the radial and ulnar sides of the fingers (i.e., 10 values on each hand), but only the ridge count with the higher value is selected for each finger (i.e., 5 values on each hand) at the individual level. The meta-analytically obtained sex dimorphism (contrasts between the mean values of the ridge counts) are virtually indistinguishable from the dimorphism from the contrasts calculated at the individual level (means of the contrasts). However, the step of selecting one (higher) ridge count from each finger blurs the dimorphism and makes interpretation of the sex differences difficult. The results cannot then be compared with those obtained from the complete set of all ridge counts on the fingers.

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Sex differences in frequencies of dermatoglyphic patterns by individual fingers

Abstract: Unzurrunzaga FM. 1976. Estudio de las líneas dermopapilares dactilares en mujeres vascas. Análisis de las diferencias sexuales y comparación de los vascos con poblaciones españolas y no españolas.

Cited by 7 publications

References 40 publications

Radioulnar contrasts in fingerprint ridge counts: Searching for dermatoglyphic markers of early sex development

Radioulnar contrasts in fingerprint ridge counts: Searching for dermatoglyphic markers of early sex development

Association between gestational period and obesity in children with the use of dermatoglyphic traits: A preliminary study

Meta-analysis of radioulnar contrasts in dermatoglyphic ridge-counts between individual fingers

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