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Application of Sliding Landmark Method for Morphological Analysis of Modern Japanese Neurocranial Shape

  • Naomichi Ogihara
  • Yusuke Morita
  • Hideki Amano
  • Osamu Kondo
  • Hiromasa Suzuki
  • Masato Nakatsukasa
Chapter
Part of the Replacement of Neanderthals by Modern Humans Series book series (RNMH)

Abstract

We apply the sliding semi-landmark method for the analysis of morphological variability in the modern Japanese population. Specifically, we prepare two kinds of template landmark configurations that will be projected onto and slid along each of the samples. We then analyze the variability in the neurocranial shape in the modern Japanese population by means of a landmark-based geometric morphometric method. We also analyze the differences in the patterns of extracted morphological variances due to different landmark configurations. Our results demonstrate that the morphological variabilities extracted by the two different template configurations generally correspond to each other, and indicate that if a sufficient number of semi-landmarks are evenly distributed across the neurocranial surface, the global tendency of the morphological variability to be extracted may not be affected by the choice of template configurations. Furthermore, the most predominant shape variability found in the cranial vault in the modern Japanese population is the brachycephalic/dolichocephalic tendency. The present semi-landmark-based approach will serve as a basis for detailed quantification and comparisons of the human neurocranial shape.

Keywords

Craniometry Geometric morphometrics Semi-landmark Skull 

Notes

Acknowledgement

We wish to express our sincere gratitude to Prof. Takeru Akazawa (Kochi Institute of Technology) for giving us an opportunity to participate in this research project and for his continuous guidance and support throughout the course of the present study. This study was supported by a Grant-in-Aid for Scientific Research on Innovative Areas “Replacement of Neanderthals by Modern Humans: Testing Evolutionary Models of Learning” from the Japanese Ministry of Education, Culture, Sports, Science and Technology.

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Copyright information

© Springer Japan 2014

Authors and Affiliations

  • Naomichi Ogihara
    • 1
  • Yusuke Morita
    • 1
  • Hideki Amano
    • 1
  • Osamu Kondo
    • 2
  • Hiromasa Suzuki
    • 3
  • Masato Nakatsukasa
    • 4
  1. 1.Department of Mechanical Engineering, Faculty of Science and TechnologyKeio UniversityYokohamaJapan
  2. 2.Department of Biological Sciences, Graduate School of ScienceUniversity of TokyoTokyoJapan
  3. 3.Research Center for Advanced Science and TechnologyUniversity of TokyoTokyoJapan
  4. 4.Laboratory of Physical Anthropology, Graduate School of ScienceKyoto UniversityKyotoJapan

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