Relationships between Sociosexuality and Dermatoglyphic Traits

Pavlína Ingrová; Miroslav Králík; Lenka Polcerová; Věra Pavlíková; Ondřej Klíma; Martin Čuta

doi:10.18778/1898-6773.88.1.03

Authors

Pavlína Ingrová Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic; Department of Archaeology and Museology, Faculty of Arts, Masaryk University, Brno, Czech Republic https://orcid.org/0000-0002-7944-1612
Miroslav Králík Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic https://orcid.org/0000-0002-2077-4068
Lenka Polcerová Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic; Institute of Biostatistics and Analyses, Ltd., Brno, Czech Republic https://orcid.org/0000-0003-3034-9599
Věra Pavlíková Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic
Ondřej Klíma Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic; Department of Computer Graphics and Multimedia and IT4Innovations Centre of Excellence Brno, Faculty of Information Technology University of Technology, Brno, Czech Republic https://orcid.org/0000-0001-9295-065X
Martin Čuta Department of Anthropology, Faculty of Science, Masaryk University, Brno, Czech Republic https://orcid.org/0000-0001-6239-383X

DOI:

https://doi.org/10.18778/1898-6773.88.1.03

Keywords:

radio-ulnar asymmetry, sex development, prenatal programming, sexual behavior, sex differences

Abstract

In humans, prenatal development of brain dispositions to sex differences in mating behavior is difficult to study directly. Indirect prenatal markers, including dermatoglyphics, present a viable option.

In this study we tested a hypothesis that some radio-ulnar contrasts in dermatoglyphic ridge counts could be related with human sociosexuality.

Sociosexual Orientation Inventory (SOI) data from 180 young adults, along with fingerprints of their terminal phalanges (via hand scanning) were collected, and relationships between SOI and dermatoglyphics were analyzed.

Typical sex differences in SOI were recorded with higher scores in males and lower in females. Among other results we found that on the index finger lower number of triradii and cores (i.e., mostly in loop type dermatoglyphic patterns) and radial-biased within-finger asymmetry in ridge counts typical for ulnar loops were connected with typical sex differences in SOI (higher in males and lower in females) while in subjects possessing an opposite dermatoglyphic arrangement – higher numbers of cores and triradii and ulnar-biased within-finger ridge count asymmetry typical in radial loops – sex differences in SOI scores disappeared. Recognized significant and systematic trends were mostly connected with variables derived from dermatoglyphic features on the 2^nd and 4^th fingers.

Possible relationships with prenatal androgen causation are discussed.

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