Fajardo Roberto J, Müller Ralph, Ketcham Rich A, Colbert Matthew
Orthopedic Biomechanics Laboratory, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
Anat Rec (Hoboken). 2007 Apr;290(4):422-36. doi: 10.1002/ar.20493.
Functional analyses of human and nonhuman anthropoid primate femoral neck structure have largely ignored the trabecular bone. We tested hypotheses regarding differences in the relative distribution and structural anisotropy of trabecular bone in the femoral neck of quadrupedal and climbing/suspensory anthropoids. We used high-resolution X-ray computed tomography to analyze quantitatively the femoral neck trabecular structure of Ateles geoffroyi, Symphalangus syndactylus, Alouatta seniculus, Colobus guereza, Macaca fascicularis, and Papio cynocephalus (n = 46). We analyzed a size-scaled superior and inferior volume of interest (VOI) in the femoral neck. The ratio of the superior to inferior VOI bone volume fraction indicated that the distribution of trabecular bone was inferiorly skewed in most (but not all) quadrupeds and evenly distributed the climbing/suspensory species, but interspecific comparisons indicated that all taxa overlapped in these measurements. Degree of anisotropy values were generally higher in the inferior VOI of all species and the results for the two climbing/suspensory taxa, A. geoffroyi (1.71 +/- 0.30) and S. syndactylus (1.55 +/- 0.04), were similar to the results for the quadrupedal anthropoids, C. guereza (male = 1.64 +/- 0.13; female = 1.68 +/- 0.07) and P. cynocephalus (1.47 +/- 0.13). These results suggest strong trabecular architecture similarity across body sizes, anthropoid phylogenetic backgrounds, and locomotor mode. This structural similarity might be explained by greater similarity in anthropoid hip joint loading mechanics than previously considered. It is likely that our current models of anthropoid hip joint mechanics are overly simplistic.
对人类和非人类类人猿灵长类动物股骨颈结构的功能分析在很大程度上忽略了小梁骨。我们检验了关于四足类和攀爬/悬吊类人猿股骨颈小梁骨相对分布和结构各向异性差异的假设。我们使用高分辨率X射线计算机断层扫描定量分析了蜘蛛猴、合趾猿、白须僧面猴、东非疣猴、食蟹猕猴和狒狒（n = 46）的股骨颈小梁结构。我们分析了股骨颈中按大小缩放的上、下感兴趣体积（VOI）。上、下VOI骨体积分数之比表明，在大多数（但不是所有）四足动物中，小梁骨分布向下偏斜，而在攀爬/悬吊类物种中分布均匀，但种间比较表明，所有分类群在这些测量中存在重叠。所有物种下VOI的各向异性值通常较高，两种攀爬/悬吊类分类群，即蜘蛛猴（1.71±0.30）和合趾猿（1.55±0.04）的结果与四足类人猿，即东非疣猴（雄性 = 1.64±0.13；雌性 = 1.68±0.07）和狒狒（1.47±0.13）的结果相似。这些结果表明，在体型、类人猿系统发育背景和运动模式方面，小梁结构具有很强的相似性。这种结构相似性可能是由于类人猿髋关节加载力学比以前认为的更相似。我们目前的类人猿髋关节力学模型可能过于简单。
