墨西哥学龄儿童掌骨尺寸和体型的性别差异。

Sexual dimorphism in metacarpal dimensions and body size of Mexican school children.

作者信息

Himes J H, Malina R M

出版信息

Acta Anat (Basel). 1977;99(1):15-20. doi: 10.1159/000144830.

Abstract

The hypothesis that patterns of sexual dimorphism in transverse dimensions of the metacarpal only reflect sex differences in body size was investigated in a sample of 324 Mexican school children 6.00-10.99 years of age. Several patterns of sexual dimorphism in second metacarpal dimensions are seen with regard to stature and weight. Sex differences in medullary diameter and percent cortical area are not related to sexual dimorphism in body size, while sex differences in cortical thickness are related to, but not fully explained by, differences in body size. Dimorphism in metacarpal diaphyseal diameter is related to differences in body size, but, at a constant body size and age, boys still have significantly larger diaphyseal diameters than girls. Finally, sexual dimorphism in cortical area is closely associated with sex differences in body size.

摘要

在324名年龄在6.00至10.99岁的墨西哥学童样本中，研究了掌骨横向尺寸的性二态性模式仅反映身体大小性别差异这一假设。在第二掌骨尺寸方面，观察到几种与身高和体重有关的性二态性模式。髓腔直径和皮质面积百分比的性别差异与身体大小的性二态性无关，而皮质厚度的性别差异与身体大小差异有关，但不能完全由身体大小差异来解释。掌骨干直径的二态性与身体大小差异有关，但在身体大小和年龄恒定的情况下，男孩的骨干直径仍显著大于女孩。最后，皮质面积的性二态性与身体大小的性别差异密切相关。