头骨厚,其内部组织,以及它与尼安德特人和现代人类内形状的关系
Sélim Natahi1, Simon Neubauer2, Zewdi J Tsegai3
1Department of Human Origins, Max Planck Institute for Evolutionary Anthropology, 04103 Leipzig, Germany; Chaire de Paléoanthropologie, CIRB, Collège de France, Université PSL, CNRS, INSERM, 75005 Paris, France.
Journal of human evolution
|May 13, 2025
概括
尼安德特人比现代人类有更厚的顶,主要是由于他们的双层. 头骨厚度的差异部分解释了这些人类群体之间的脑形状变化.
科学领域:
- 古人类学古人类学.
- 人类进化人类进化
- 比较解剖学的比较解剖学
背景情况:
- 现代人类拥有球状的头骨,与尼安德特人较长的头骨不同.
- 驱动这些形状差异的根本因素,特别是顶厚度 (CVT),尚未完全理解.
- CVT的变化可能反映了顶层对各种刺激的不同反应.
研究的目的:
- 调查CVT差异在多大程度上解释了现代人类和尼安德特人之间的内形状差异.
- 量化个体顶层 (内部和外部表,双层) 对总体CVT变化的贡献.
- 在两组中探索CVT和内形态之间的关系.
主要方法:
- 分析了7个尼安德特人和75个现代人类的头骨样本.
- 应用射线造方法来精确测量皮层,双层和整体CVT.
- 利用几何形态测量来量化内形状和部分最小方形分析来评估CVT形状关系.
主要成果:
- 与现代人类相比,尼安德特人通常表现出更大的CVT和更厚的顶层,覆盖范围.
- 尼安德特人中增加的CVT主要归因于双层层,显示出明显的厚度分布模式.
- 皮层表显示了群体之间独特的厚度分布模式,在头骨骨中表现出明显的结构差异.
结论:
- CVT 差异,特别是在双,有助于尼安德特人和现代人类独特的内形状.
- 在皮层表和骨中明显的厚度模式突出了特定的结构适应.
- 现代人类中存在着CVT和内形状之间的独特关联,在尼安德特人中不存在.
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