Sex differences in the sciatic notch of great apes and modern humans

American Journal of Physical Anthropology
L D Hager

Abstract

The sciatic notch has been widely used as a sexing criterion in modern humans. In order to better understand the sex differences of this feature in modern humans and great apes, four measurements of the sciatic notch were taken on samples of modern humans and great apes of known sex. Univariate (ANOVA) analysis and discriminant function analysis were performed on the extant taxa to determine: (1) the discriminating power of each variable in these samples of known group membership; and (2) which of these extant taxa shows the best discrimination between the sexes for the sciatic notch. Of the four extant taxa, the sciatic notch of Homo sapiens is the most sexually dimorphic, followed by Gorilla gorilla, and more weakly by Pongo pygmaeus, while Pan troglodytes is the least dimorphic of these taxa. Since the presence of a well defined sciatic notch is a hominid trait resulting from the dorsal extension of the posterior ilium, the close approximation of the sacrum to the acetabulum, the shortened ischium, and the accentuation of the ischial spine as part of the bipedal adaptation, it seems likely that the configuration of the sciatic notch in hominids was initially related to bipedalism, not reproduction. The development of sex dif...Continue Reading

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Citations

Jul 12, 2002·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Louise Scheuer
Feb 17, 2015·American Journal of Physical Anthropology·Kristi L Lewton
May 17, 2019·American Journal of Physical Anthropology·Frédéric SantosJaroslav Bruzek
Jul 28, 2012·Anatomia, histologia, embryologia·P M Parés-Casanova
May 16, 2006·Journal of Forensic Sciences·Gali Dar, Israel Hershkovitz
Mar 27, 2021·Nature Ecology & Evolution·Barbara FischerPhilipp Mitteroecker
Jul 4, 2021·Gait & Posture·Robert D Catena, W Connor Wolcott
May 16, 2009·Forensic Science International : Synergy·Paula N GonzalezS Ivan Perez
Jul 14, 2010·Forensic Science International : Synergy·Laura A B WilsonLouise T Humphrey

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