[Plantar zygodactylous triradii in a population comparison]

Area of Science:

• Anthropology
• Genetics
• Dermatoglyphics

Background:

• Plantar prints offer insights into human population variations.
• Zygodactylous triradii are specific ridge configurations on the sole of the foot.
• Previous studies suggest geographical variations in dermatoglyphic traits.

Purpose of the Study:

• To investigate the frequencies and expression types of zygodactylous triradii in Japanese males.
• To compare these findings with European populations, specifically Viennese males.
• To identify population-specific dermatoglyphic patterns in the plantar region.

Main Methods:

• Analysis of plantar footprints from 125 Japanese males.
• Comparison with existing data from 500 Viennese males.
• Examination of zygodactylous triradii frequencies, expression types, and pattern formations (loops, whorls).

Main Results:

• Significant differences were found in zygodactylous triradii frequencies and expression between Japanese and Viennese populations.
• Japanese individuals showed very low frequencies of medium expression and no strong expression, unlike Europeans (approx. 60%).
• Japanese plantar prints lacked proximal loops in the second interdigital area and whorls in the third, contrasting with high frequencies in Europeans, Bantus, and Germans.

Conclusions:

• The study reveals distinct dermatoglyphic differences in plantar triradii between Japanese and European populations.
• These variations are substantial enough to suggest fundamental population differences.
• Further research is needed to explore potential correlations between toe alignment and zygodactylous triradii occurrence.