Doctor of Philosophy, The Ohio State University, 2017, Anthropology
Biological anthropologists estimate sex from skeletal remains for forensic identification purposes or to reconstruct demographic profiles of past populations. Several features of the human cranium exhibit observable differences between males and females, known as sexual dimorphism. These sex-based differences are due to size disparities in muscle attachment sites as well as hormonal variations (Russell, 1985; Bass, 2005). A problem facing biological anthropologists is that of secular trends, or changes in physical traits over time; in the human skeleton. Most skeletal secular changes have been noted within the last 50 years (Jantz and Jantz, 1999, 2000). The most apparent secular trend is the increase in long bone length, and the consequent increase in height (Jantz and Jantz, 1999). Additionally, the human cranium has gotten taller and narrower, which can affect accurate sex estimation (Jantz et al., 2012). This research examines areas of the human skull that differ between the sexes and explores whether secular changes have affected sexually dimorphic areas of the cranium.
The sample consists of 716 adult human crania of European European and African American ancestries from three skeletal collections: the Hamann-Todd Collection at the Cleveland Museum of Natural History, the Documented Skeletal Collection from the University of New Mexico's Maxwell Museum, and the William M. Bass Donated Skeletal Collection housed at the University of Tennessee. The crania come from four defined generations, spanning birth years from 1864 to 1992. The individuals in the present sample were specifically chosen to fall between the ages of 20 and 60 to eliminate those who would not reflect pubertal changes and those who might show the most exaggeratedly robust cranial features in older age. To increase measurement accuracy, crania exhibiting fragmentation, trauma, or pathological conditions were not included.
This dissertation includes skeletal samples from European American a (open full item for complete abstract)
Committee: Paul Sciulli (Advisor); Samuel Stout (Committee Member); Douglas Crews (Committee Member)
Subjects: Behavioral Sciences