Sirianni J E, van Ness A L
Am J Phys Anthropol. 1978 Sep;49(3):329-39. doi: 10.1002/ajpa.1330490306.
Postnatal growth of the cranial base was longitudinally studied in 21 male and 11 female Macaca nemestrina. The basicranium of each animal was marked with tantulum implants in order that the tracings of each serial roentgenogram could be superimposed. Between the ages of 3.0 and 5.0 years the degree of sexual demorphism in both angular and linear dimensions increased. The cranial base flattened as a result of the upward and forward migration of nasion and the upward and backward relocation of basion. The movement of basion was primarily due to differential growth recorded at the spheno-occipital synchondrosis. Sexual difference in the relative growth of this synchondrosis resulted in a longer and somewhat flatter male cranial base. Male and female velocity curves showed accelerations that coincide with their estimated age for the onset of puberty.
对21只雄性和11只雌性黑冠猕猴的颅底出生后生长情况进行了纵向研究。为了能将每张连续X线照片的描图叠加起来，给每只动物的颅底植入了钽标记物。在3.0至5.0岁之间，角度和线性维度上的两性差异程度都增加了。由于鼻根向上和向前移动以及颅底基向前和向后移位，颅底变平。颅底基的移动主要是由于蝶枕软骨结合处记录到的差异生长。该软骨结合处相对生长的性别差异导致雄性颅底更长且略扁平。雄性和雌性的速度曲线显示出的加速与它们估计的青春期开始年龄一致。
