Hassanali J
Department of Human Anatomy, University of Nairobi, Kenya.
Folia Primatol (Basel). 1991;56(1):28-32. doi: 10.1159/000156524.
Six biometric measurements were recorded from dry mandibles of 53 Papio anubis and 84 Cercopithecus aethiops: intercondylar width, intercoronoid width, intermolar width (IMW), mesiodistal width of the condyles, height of the occlusal table and anteroposterior length of the chewing surface from P4 to M3 (CL). The mean values and correlation matrices of these variables show that, despite the difference in size, the overall shape of the mandible in male and female is similar within species. The principal component analysis shows that in P. anubis the six variables contribute almost equally to the first component (75% of total variance), suggesting that the large mandible may be force related because of the greater mechanical forces required for chewing certain foods. In C. aethiops, the contribution of IMW and CL is less in the first component (52.7% of total variance), suggesting that the biochemical forces of mastication are more complex to adapt the mandible to a shorter muzzle and a particular diet.
从53只东非狒狒和84只埃塞俄比亚长尾猴的干燥下颌骨上记录了六项生物特征测量数据：髁间宽度、冠突间宽度、磨牙间宽度（IMW）、髁突的近远中宽度、咬合面高度以及从P4到M3的咀嚼面的前后长度（CL）。这些变量的平均值和相关矩阵表明，尽管体型存在差异，但同一物种内雄性和雌性下颌骨的整体形状相似。主成分分析表明，在东非狒狒中，这六个变量对第一成分的贡献几乎相同（占总方差的75%），这表明较大的下颌骨可能与力量有关，因为咀嚼某些食物需要更大的机械力。在埃塞俄比亚长尾猴中，IMW和CL在第一成分中的贡献较小（占总方差的52.7%），这表明咀嚼的生化力量更为复杂，以使下颌骨适应较短的口鼻部和特定的饮食。
