在线性测量和横截面几何学不对称在部在本体发生过程中
Benjamin Osipov1, Lesley Harrington2, Libby Cowgill3
1Department of Orthopaedic Surgery, University of California, Davis Health, Sacramento, California, USA.
随着年龄的增长,骨的长度,形状和刚性都会变得不对称,但这些特征是独立发展的. 这一发现影响了我们如何从骨遗骸中重建行为,特别是在史前人口中.
科学领域:
- 古人类学古人类学.
- 骨生物学 骨生物学
- 生物力学 生物力学
背景情况:
- 成年人的上肢不对称性用于推断行为.
- 骨长度,横截面几何学 (CSG) 和关节尺寸不对称的发育模式尚未得到充分理解.
研究的目的:
- 为了检查部不对称的发育轨迹.
- 为了确定骨长度,关节大小和CSG的不对称性是否协同发展.
主要方法:
- 分析了史前狩猎采集人口 (n=82) 的3D humeri模型.
- 测量包括骨的长度,宽度,曲刚度 (Imax和Imin) 和截面形状 (Imax/Imin).
- 使用牙科年龄队列来评估本体遗传趋势,计算百分比绝对 (%AA) 和定向 (%DA) 非对称.
主要成果:
- 不对称性在新生儿中最低,并且随着年龄的增长而增加,特别是在中近端截面曲刚性的方向不对称性.
- 曲刚度显示最高的%AA和%DA,其次是形状和线性尺寸.
- 变量之间的相关性低至中等,变量之间的不对称的匹配方向低,随着年龄的增长而增加.
结论:
- 截面几何 (CSG) 变量与年龄的相关性更高,表明对机械负荷的反应更强.
- 不对称的大小和侧面优势的低相关性表明,刚性,形状和线性测量之间的不对称的独立发展.
- 不对称性的异质发展可能源于不对称负载如何影响线性和CSG变量的本体发生的差异.
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