Bilateral Asymmetry of the Humerus in Jomon People and Modern Japanese
Bilateral Asymmetry of the Humerus in Jomon People and Modern Japanese
复制标题
绳文人和现代日本人肱骨的两侧不对称
DOI：
10.1537/ase.105.231
复制
发表时间：
1997
影响因子：
0.7
通讯作者：
K. Sakaue
中科院分区：
文献类型：
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作者：
K. Sakaue
在本研究中，我检查了63名现代日本人（男性46人，女性17人）和40名绳纹人（男性20人，女性20人）的肱骨的几种形态特征的双侧不对称性，目的是区分受机械负荷强烈影响的metric特征和不受机械负荷影响的特征，并讨论绳纹人上臂的负荷情况。结果表明，除了近端骨骺宽度外，两侧肱骨长度和所有其他测量的不对称与骨干几何特性的不对称没有显著相关。由于长骨的纵向生长在骨骺与骨外骺融合时停止，而皮质重塑则持续一生，因此目前的结果可以解释如下：1)纵向的双侧不对称可能反映了20岁左右的累积负荷情况，2)横向的双侧不对称反映了相对接近死亡时间的负荷情况。根据绳纹人上臂的负重情况推断，绳纹人的上臂比现代日本人和一些狩猎采集者（美洲印第安人）更强壮。绳纹人上臂的受力情况也可能比其他人群更不对称，但两性之间存在很大差异。
In the present study, I examined the bilateral asymmetries of several morphological characters of the humerus of 63 modern Japanese (male 46, female 17) and 40 Jomon people (male 20, female 20) with the aim of distinguishing be-tween metric features that are strongly affected by mechanical loading and those that are not, and to discuss the loading conditions of the upper arms of Jomon people.The results were that the bilateral asymmetries of humeral length and all other mea-surements except for proximal epiphyseal breadth did not correlate significantly with asymmetries of diaphyseal geometric properties.Since the longitudinal growth of a long bone stops when its epiphyses are fused with the metaphyses while corticla remodelling goes on for life, the present results can be interpreted as follows: 1) Bilateral asymmetries in the longitudinal direction is likely to reflect the cumulative loading conditions to around an age of 20 years, and 2) bilateral asymmetries in the tranverse direction reflects loading conditions relatively close to the time of death.Regarding the loading conditions inferred for the upper arms of Jomon people, it is suggested that they were stronger than in modern Japanese and some hunter-gather-ers (Amerindians).The loading conditions of the upper arms of Jomon people were also likely to be less asymmetric than in other populations, while differing consid-erably between sexes.