Wouterlood F G, Dullemeijer P
Anat Anz. 1979;145(1):1-16.
On one side of chick embryos in stage 28, part of the prospective lower beak or the entire prospective lower beak anterior to the buccal corner was removed surgically (CLB-A and CLB-B embryos, respectively). In another group the prospective lower beak was split in the midsagittal plane (CMS embryos). The controls were shame-operated embryos (CS). The skulls of stage 39 CLB-A and CLB-B embryos showed changes in the lower beak as well as in the skull base, the pterygoid, the quadrate, the palatine, and the upper beak. Stage 39 CMS embryos showed shortening of the dentary and Meckel's cartilage. At the tip of the CMS mandible, an excessive amount of osseous material was found. The results support Dullemeijer's (1974) views concerning the issue of dependency of functional components. The value of a combined developmental and functional approach to morphology, i.e., integrated investigation of development of structure and function of the beaks and related jaw musculature, is discussed.
在第28阶段的鸡胚一侧，手术切除预期下喙的一部分或颊角前方的整个预期下喙（分别为CLB - A和CLB - B胚胎）。在另一组中，预期下喙在矢状面中部被劈开（CMS胚胎）。对照组为假手术胚胎（CS）。第39阶段CLB - A和CLB - B胚胎的头骨显示下喙以及颅底、翼状骨、方骨、腭骨和上喙有变化。第39阶段CMS胚胎显示齿骨和梅克尔软骨缩短。在CMS下颌骨尖端发现大量骨质物质。结果支持了杜勒梅杰（1974年）关于功能成分依赖性问题的观点。讨论了将发育和功能方法相结合用于形态学研究的价值，即对口喙及相关颌部肌肉组织的结构和功能发育进行综合研究。
