A micro-CT based study of the endocranial morphology of the Minatogawa I cranium
A micro-CT based study of the endocranial morphology of the Minatogawa I cranium
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基于显微 CT 的 Minatokawa I 颅骨内颅形态研究
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
G. Suwa
中科院分区：
文献类型：
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作者：
Daisuke Kubo;Reiko T. Kono;G. Suwa
冲绳Minatogawa的晚更新世人类化石（个体I-IV）对于研究日本列岛的人口历史和理解东亚智人的进化具有重要意义。这项研究是第一次在Minatogawa I的颅内形态，基于微型计算机断层扫描（micro-CT）。我们对Minatogawa I型内窥镜进行了数字化重建，并使用三维打印机系统创建了其物理模型。我们比较了Minatogawa I型内镜和现有的H。智人和古人类的内模。我们发现Minatogawa I具有H. sapiens，如高度升高的顶骨，仅限于相对前部位置的颅内扩大，以及狭窄的内部枕嵴。短、宽、低比例的Minatogawa I硬脑膜位于本研究现代人类变异范围的边缘。Minatogawa I型的内模显示出轻微不发达的额区，有明显的副嵴，一个弱的颅内顶叶隆起，和一个强的颞部隆起。与柳江不同的是这些特征的强烈表达以及整体的度量比例。一个弱的颅内顶骨隆起和一个强的颞部隆起是Skhul V和Qafzeh 9所共有的，可能代表了H的原始条件。一般的智人
The Late Pleistocene fossil human remains (individuals I–IV) of Minatogawa, Okinawa Island are important in addressing the population history of the Japanese archipelago and in understanding evolution of Homo sapiens in eastern Asia. This study is the first on Minatogawa I’s endocranial morphology, based on micro-computed tomography (micro-CT). We digitally reconstructed the Minatogawa I endocast, and created its physical model using a three-dimensional printer system. We compared the Minatogawa I endocast with available H. sapiens and archaic Homo endocasts. We found that Minatogawa I exhibits key derived endocranial features of H. sapiens, such as a highly elevated parietal, endocranial widening confined to a relatively anterior position, and a narrow internal occipital crest. The short, wide, and low proportioned Minatogawa I endocranium lies metrically at the margins of the modern human ranges of variation of this study. The Minatogawa I endocast exhibits a slightly underdeveloped frontal region with marked parasagittal ridges, a weak endocranial parietal boss, and a strong temporal bulge. It differs from Liujiang in the strong expression of these features as well as in overall metric proportions. A weak endocranial parietal boss and a strong temporal bulge are shared by Skhul V and Qafzeh 9, and may represent a primitive condition for H. sapiens in general.