Cranial integration in Homo:: singular warps analysis of the midsagittal plane in ontogeny and evolution
Cranial integration in Homo:: singular warps analysis of the midsagittal plane in ontogeny and evolution
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DOI：
10.1016/s0047-2484(02)00201-4
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发表时间：
2003-02-01
影响因子：
3.2
通讯作者：
Seidler, H
中科院分区：
文献类型：
--
作者：
Bookstein, FL;Gunz, P;Seidler, H
这项研究解决了一些持久的问题的个体发育和进化整合的形式的原始人头骨。我们的样本包括38个颅骨：20个现代成年智人，14个亚成年人。智人和四个古人类除2例婴儿H.而不是通过MR成像。对于每个标本，84个界标和半界标位于正中矢状面，并转换为Procrustes形状坐标。整合的量化方法的奇异翘曲，一个新的几何统计方法来可视化regions.The两个经典的整合模式，进化和个体发育，跨越范围内的不同假设因素的重叠子样本的比较分析，共同探讨。进化整合在24个成年人的子样本中表达，个体发育整合在34个H的子样本中表达。智人在这个数据集中，穹窿，颅底，和脸显示出惊人的和本地化的模式，个体发育的协变，类似但不完全相同的模式，在进化。个体发育和胚胎发育的主要区别在于颅底。还有一个颅长与颅高之比的组成部分不能归约到任何一个过程。我们的方法允许分离这些独立的过程（及其对颅骨形状的影响），这是传统方法所没有的。（C）2003 Elsevier Science Ltd.保留所有权利。
This study addresses some enduring issues of ontogenetic and evolutionary integration in the form of the hominid cranium. Our sample consists of 38 crania: 20 modern adult Homo sapiens, 14 subadult H. sapiens, and four archaic Homo. All specimens were CT-scanned except for two infant H. sapiens, who were imaged by MR instead. For each specimen 84 landmarks and semilandmarks were located on the midsagittal plane and converted to Procrustes shape coordinates. Integration was quantified by the method of singular warps, a new geometric-statistical approach to visualizing correlations among regions.The two classic patterns of integration, evolutionary and ontogenetic, were jointly explored by comparing analyses of overlapping subsamples that span ranges of different hypothetical factors. Evolutionary integration is expressed in the subsample of 24 adult Homo, and ontogenetic integration in the subsample of 34 H. sapiens. In this data set, vault, cranial base, and face show striking and localized patterns of covariation over ontogeny, similar but not identical to the patterns seen over evolution. The principal differences between ontogeny and phylogeny pertain to the cranial base. There is also a component of cranial length to height ratio not reducible to either process. Our methodology allows a separation of these independent processes (and their impact on cranial shape) that conventional methods have not found. (C) 2003 Elsevier Science Ltd. All rights reserved.