Type analyses of scapular shape changes from age to age of Japanese referring to Tokugawa Shoguns and Ainus

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  • HOJO Teruyuki
    University of Sangyoidai, School of Medicine, Department of Anatomy and Anthropology

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  • 日本人肩甲骨形状の時代的変化の研究に基づく徳川将軍集団とアイヌ集団のタイプ分析
  • ニホンジン ケンコウコツ ケイジョウ ノ ジダイテキ ヘンカ ノ ケンキュウ ニ モトズク トクガワ ショウグン シュウダン ト アイヌ シュウダン ノ タイプ ブンセキ

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Abstract

Scapular shape changes from age to age (Items: Morphological length and Supraspinous fossa breadth) of people of Jomon, Muromachi, Edo, Modern referring to Ainus in Hokkaido, and Tokugawa Shoguns were analyzed and classified into 4 types using principal components analysis. Scapulae of Jomon age and Ainus were muscularly square (Type I), and those of Tokugawa Shoguns were weak and slender, and their shapes were becoming higher in the later period of Edo age (Type IV). Scapulae of Muromachi age (Type II) and Edo age (Type III) were very close each other, and squarely broad, and those of Modern were squarely slender (Type III), but robuster than those of Tokugawa Shoguns. Tokugawa Shoguns should have thin chests. The shape changes of scapulae suggested discussion about adaptation of scapulae to the changes of their life styles.

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