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Open AccessArticle

Functional Asymmetry and Fingerprint Features of Left-Handed and Right-Handed Young Yakuts (Mongoloid Race, North-Eastern Siberia)

1
Institute for Biological Problems of Cryolithozone SB RAS, Lenin av., 41, Yakutsk 677980, Russia
2
Research Institute of Applied Ecology, North-Eastern Federal University, Lenin av., 1, Yakutsk 677000, Russia
*
Author to whom correspondence should be addressed.
Symmetry 2018, 10(12), 728; https://doi.org/10.3390/sym10120728
Received: 10 October 2018 / Revised: 26 November 2018 / Accepted: 4 December 2018 / Published: 6 December 2018
(This article belongs to the Special Issue Applications Based on Symmetrical Characteristics of the Human Body)
An ethnically homogeneous group of Yakuts (Mongoloid race, Northeast Asia), aged 18–31, was studied to characterize the diversity of particular features between left- and right-handed individuals. A total of 52 left-handed (32 women and 20 men) and 100 right-handed (50 women and 50 men) individuals were studied. Testing included two sets of questions and tasks, dynamometry of the right and left hand, and fingerprint analysis. Left-handed and right-handed people were found to differ in functional asymmetry of psychophysiological and motor reactions. Right-handers were characterized by higher intragroup similarity, while, among left-handers, greater dispersion of these traits was observed. Asymmetry in hand grip strength was less pronounced in the left-handed people than in the right-handed; this difference was statistically significant, and the difference was greater in men than in women. This suggests that the non-dominant hand in the left-handed people was subjected to a greater load and indicates the forced adaptation of the left-handed people to “dextrastress”. No significant difference between sexes was found when analyzing fingerprint patterns. Left-handers had arches significantly more often than right-handers. Radial loops were most often found on the index finger, and, in the left-handers, their occurrence was significantly higher on three to five fingers of the left hand compared with the right-handers. The levels of fluctuating asymmetry in left-handers and right-handers were similar. View Full-Text
Keywords: anthropology; handedness; dermatoglyphics; fingerprints; functional asymmetry; fluctuating asymmetry anthropology; handedness; dermatoglyphics; fingerprints; functional asymmetry; fluctuating asymmetry
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Shadrina, E.; Vol’pert, Y. Functional Asymmetry and Fingerprint Features of Left-Handed and Right-Handed Young Yakuts (Mongoloid Race, North-Eastern Siberia). Symmetry 2018, 10, 728.

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