Sexual dimorphism in directional asymmetry of the upper limb bones among Khoe-San skeletons

Homo : internationale Zeitschrift für die vergleichende Forschung am Menschen
M Waidhofer, S Kirchengast

Abstract

Right side-biased directional asymmetries in upper limb bones are described for non-human primates, modern humans and also for historical populations. According to numerous studies the degree of bilateral asymmetries varies by sex, possibly due to sex-typical labor division. The present study focused on sexual dimorphism in bilateral asymmetries of the upper limb bones among a historical Khoe-San skeletal sample, the Pöch Collection housed at the Department of Anthropology at the University of Vienna. Forty metric dimensions of humeri, ulnae, radii and clavicles of 83 adult Khoe-San individuals were measured. Directional and absolute asymmetries of each measurement were calculated. With the exception of maximal clavicle length, a significant right-biased asymmetry could be documented for both sexes. Regarding sex differences, it could be shown that a markedly greater percentage of right side dominant asymmetry of humerus length and upper limb length was found among females, while male skeletons exhibited a significantly greater percentage of absolute asymmetry in breadth and circumference dimensions, indicating a greater asymmetry in traits of robustness. These sex differences can be interpreted as a result of sex-typical labor...Continue Reading

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Citations

May 31, 2016·American Journal of Human Biology : the Official Journal of the Human Biology Council·Anna Maria KubickaJanusz Piontek
Oct 5, 2016·American Journal of Human Biology : the Official Journal of the Human Biology Council·Sylvia Kirchengast
May 12, 2016·Perceptual and Motor Skills·Kewal Krishan, Tanuj Kanchan

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