概括
化石内分泌物在肯尼亚的早期原始人类中显示出明显的人类和猿类的额叶模式. 这种古解剖学证据表明,至少有两种不同的原始人物种在200万年前在东非共存.
科学领域:
- 古人类学古人类学.
- 人类进化人类进化
- 古老神经病学 (paleoneurology) 是一种神经病学.
背景情况:
- 化石记录为早期人类进化提供了至关重要的见解.
- 了解人类大脑的进化,特别是额叶,是追踪人类起源的关键.
- 内提供了一个窗口,从化石遗骸中了解大脑形态.
研究的目的:
- 分析和比较前额叶皮层状的模式,早期的原始人内分泌物从科比福拉斯,肯尼亚.
- 为了确定由这些化石所代表的大脑发育的进化阶段.
- 为了研究在普世早期在东非存在的原始人物种的多样性.
主要方法:
- 来自肯尼亚Koobi Fora地区的人类头骨的重建. 肯尼亚.
- 创建和分析内分泌物以研究内形态,专注于额叶.
- 与已知的化石原始人类和现存灵长类动物对内播模式的比较.
主要成果:
- 一个大约200万年前的内置物表现出已知最古老的类似人类的皮质形图案.
- 来自同一地区的另一种内分泌物显示了类似子的额叶图案,类似于早期的南非澳大利亚类动物.
- 这些发现表明,在同一地理区域和时间段内,原始人大脑形态学存在显著差异.
结论:
- 至少有两种不同类型的早期人猿在东非共存.
- 类似人类和类似猿类的额叶模式的存在挑战了关于早期人类多样性的先前假设.
- 这项研究增强了我们对早期人类祖先复杂的进化格局的理解.
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