White C D
Department of Anthropology, University of Western Ontario, London.
Am J Phys Anthropol. 1996 Jul;100(3):397-410. doi: 10.1002/(SICI)1096-8644(199607)100:3<397::AID-AJPA7>3.0.CO;2-R.
Maya adult crania from the site of Lamanai, Belize provide a retrospective means of examining growth processes in the cranial vault. The Lamanai population practiced fronto-occipital deformation which is found to be significantly associated with premature sagittal synostosis and wormian bones of the lambdoidal suture. The undeformed members of the population also exhibit an abnormally high frequency of sagittal synostosis, but a significantly lower frequency than the deformed sample. It is suggested that the deforming apparatus creates tensile forces on the sagittal suture during the peak period of growth of the parietals, and that these forces might induce an adaptive response important in producing premature sagittal synostosis. The undeformed sample may have an increased congenital risk of sagittal synostosis created by their natural brachycephalic morphology in utero. The frequency patterning of wormian bones suggests a mixture of genetic and environmental causes in which tensile forces may also play a role.
来自伯利兹拉马奈遗址的玛雅成年人颅骨提供了一种回顾性方法，用于研究颅顶的生长过程。拉马奈人群实行额枕部变形，发现这与矢状缝过早闭合和人字缝的缝间骨显著相关。该人群中未变形的个体也表现出矢状缝过早闭合的异常高频率，但比变形样本的频率显著更低。有人提出，变形器具在顶骨生长高峰期对矢状缝产生拉力，并且这些力可能诱导一种在产生过早矢状缝闭合中起重要作用的适应性反应。未变形样本可能因其子宫内自然的短头形态而有增加的矢状缝过早闭合的先天性风险。缝间骨的频率模式表明存在遗传和环境因素的混合，其中拉力可能也起作用。
