Hauser G, De Stefano G F
Am J Phys Anthropol. 1985 May;67(1):7-11. doi: 10.1002/ajpa.1330670103.
Variation in the nature and extent of division of the hypoglossal canal can be classified by a simple scoring scheme. Applied to three series of crania of differing provenance, the results indicate a continuity in expression of the trait rather than the dichotomous character utilized in previous studies. The similarity in results in these three populations, of widely differing environment, suggests fairly strict canalization of development.
舌下神经管的性质和分隔程度的变异可以通过一种简单的评分方案进行分类。应用于三个来源不同的颅骨系列，结果表明该特征的表达具有连续性，而非先前研究所采用的二分特征。这三个环境差异很大的人群的结果相似，表明发育受到相当严格的 canalization。 （注：“canalization”在发育生物学中有特定含义，可译为“定向分化”等，此处保留英文未翻译，需结合具体学科背景确定准确译名）
