Investigations of the Biological Consequences and Cultural Motivations of Artificial Cranial Modification Among Northern Chilean Populations
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Western University Scholarship@Western Electronic Thesis and Dissertation Repository 7-20-2012 12:00 AM Investigations of the Biological Consequences and Cultural Motivations of Artificial Cranial Modification Among Northern Chilean Populations Christine E. Boston The University of Western Ontario Supervisor Dr. Andrew Nelson The University of Western Ontario Graduate Program in Anthropology A thesis submitted in partial fulfillment of the equirr ements for the degree in Doctor of Philosophy © Christine E. Boston 2012 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Archaeological Anthropology Commons, and the Biological and Physical Anthropology Commons Recommended Citation Boston, Christine E., "Investigations of the Biological Consequences and Cultural Motivations of Artificial Cranial Modification Among Northern Chilean Populations" (2012). Electronic Thesis and Dissertation Repository. 665. https://ir.lib.uwo.ca/etd/665 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. Investigations of the Biological Consequences and Cultural Motivations of Artificial Cranial Modification Among Northern Chilean Populations (Spine title: Artificial Cranial Modification in Northern Chile) (Thesis format: Integrated Article) by Christine Elisabeth Boston Graduate Program in Anthropology A thesis submitted in partial fulfillment of the requirements for the degree of Doctorate of Philosophy The School of Graduate and Postdoctoral Studies The University of Western Ontario London, Ontario, Canada © Christine Elisabeth Boston 2012 i THE UNIVERSITY OF WESTERN ONTARIO School of Graduate and Postdoctoral Studies CERTIFICATE OF EXAMINATION Supervisor Examiners ______________________________ ______________________________ Dr. Andrew Nelson Dr. Christine White Supervisory Committee ______________________________ Dr. Alexis Dolphin ______________________________ Dr. Christine White ______________________________ Dr. Sonia Guillen ______________________________ Dr. Alexis Dolphin ______________________________ Dr. Drew Smith The thesis by Christine Elisabeth Boston entitled: Investigations of the Biological Consequences and Cultural Motivations of Artificial Cranial Modification Among Northern Chilean Populations is accepted in partial fulfillment of the requirements for the degree of Doctorate of Philosophy ______________________ _______________________________ Date Chair of the Thesis Examination Board ii Abstract The purpose of this study is to build on existing normative models of craniofacial growth and previous craniofacial studies of artificial cranial modification (ACM) in order to deepen the cultural and biological understanding of the this practice. Areas of concentration include a study of the biological changes to cranial epigenetic traits and facial metrics related to ACM, an examination of the biological effects of ACM in order to assess their implications on morbidity and mortality, and an investigation into the cultural motivations for ACM. Three hypotheses were tested: 1) ACM did not affect epigenetic trait incidence or facial metrics; 2) ACM increased morbidity and mortality of modified individuals; and 3) ACM was a marker of either social status or ethnicity. These hypotheses were addressed using quantitative and qualitative analyses of the craniofacial skeleton of ancient northern Chilean groups, including cephalometrics, craniometrics, various statistical analyses, and survey of specific epigenetic traits, pathological conditions, and grave goods. As well, these hypotheses were also addressed using various ACM typologies placed within the context of a “nested typology”. It was concluded that when ACM styles are pooled the effects of ACM are not discernable, but the results did demonstrate that the various ACM styles do affect epigenetic traits and some facial metrics. ACM did minimally affect morbidity and mortality within these samples. As well, ACM was not practiced solely as a marker of social status or ethnicity, and it was ultimately determined that motivations for practicing ACM were multifactorial. Keywords Artificial cranial modification, Azapa Valley, Lluta Valley, Camarones Valley, cephalometry, epigenetic traits, status, ethnicity, Chile iii Acknowledgements This research was funded in part by the Ontario Graduate Scholarship (2009-2010), GTA Union Scholarships, and the Mason’s Student Scholarship. I would like to extend a special thanks to my Chilean colleagues, Dr. Bernardo Arriaza, Vivien Standen, Octavio Lagos Flores, Dr. Carlos Ubceda, Mayorie Chandia, Mariel Gonzalez, Dr. Marietta Ortega, Natalia Escobar, Osvaldo San Juan, and the many others who aided me in research. Some of my research may not have been completed without their help and I will be forever grateful. Muchas gracias! I would also like to extend a special thanks to my North American colleagues, Dr. Vicki Cassman, for generously donating her data for the completion of part of this research, and Dr. Richard Sutter, for his insights into the Chilean collections. I would also like to thank my PhD Committee, Dr. Christine White, Dr. Jean-Francois Millaire, Dr. Alexis Dolphin, Dr. Sonia Guillen, and Dr. Drew Smith, for their constructive feedback. I must add further thanks to Drs. Smith and Millaire for providing me use of facilities, books, and assistance in completing this doctoral research and written dissertation. Along these lines, I would be remiss in not thanking Dr. Lesley Short for training me in cephalometric methods and inspiring some of these research methods. I would not be here at this time without the supervision of Dr. Andrew Nelson. I must thank him for suggesting this project and his assistance along the way. I also want to thank his wife, Christine, for her words of encouragement and eating my cookies. My family, friends, and fur babies have been great supports over the last few years- always being there during the good and bad times. I could not have done this without you and will never forget your assistance. Thank you. I apologize to any one I may have forgotten to acknowledge here. It’s been a long road. You will be remembered and thanked in person (and probably with an apology beer). iv Table of Contents CERTIFICATE OF EXAMINATION ........................................................................... ii Abstract .............................................................................................................................. iii Acknowledgments……...................................................................................................... iv Table of Contents ................................................................................................................ v List of Tables ..................................................................................................................... ix List of Figures .................................................................................................................. xiv Chapter 1 ............................................................................................................................. 1 1 Introduction ............................................................................................................... 1 1.1 Literature Review: Artificial Cranial Modification ................................................ 1 1.2 Outline of Doctoral Research ……………………………………………………..4 1.3 Artificial Cranial Modification & Cranial Morphological Change……………….4 1.3.1 Hypothesis Testing ……...………………………………………………………5 1.4 Artificial Cranial Modification & Morbidity and Mortality…..……………...…..6 1.4.1 Hypothesis Testing ……………………………………………………………...6 1.5 Artificial Cranial Modification & Social Motivations…...……........................…..8 1.5.1 Artificial Cranial Modification and Ethnicity...…………….…………………...9 1.5.2 Artificial Cranial Modification and Social Status….…………………...……...10 1.5.3 Hypothesis Testing……………………………………………………………..10 1.6 Format of Dissertation…………………………………………………………...11 Bibliography………………………………………………………………………….12 Chapter 2 ........................................................................................................................... 20 2 Literature Review of Cranial Modification and Nested Typology.......................... 20 2.1 Cultural Motivations of Artificial Cranial Modification ...................................... 21 v 2.2 Artificial Cranial Modification-Related Growth Changes……………………….25 2.2.1 Artificial Cranial Modification and Craniofacial Growth Studies…..................25 2.2.2 Artificial Cranial Modification and Epigenetic Traits Studies ………………..29 2.3 Typological Designations of Artificial Cranial Modification Styles…………....32 2.4 Nested Typology: New Method, Possible Solution.……………………………..36 2.5 Solution 2: Distinguishing Artificial Cranial Modification Styles Through Geometric Morphometric Analyses …………………………………………..…41 2.6 Conclusion ……………………………………………….……………………...44 Bibliography………………………………………………………………………….45 Chapter 3 ........................................................................................................................... 53 3 Examining the Effects of Artificial Cranial Modification on Craniofacial Epigenetic Traits and Facial Metrics …………………........................................53 3.1 Materials and Methods ........................................................................................