Strasmann T
Anatomisches Institut der Universität Hamburg, Bundesrepublik Deutschland.
Acta Anat (Basel). 1987;130(3):197-212.
The anlage of the cervical vertebral column of a human embryo has been investigated (9 mm CRL, Carnegie stage 16). The nuclear density in the axial mesenchyme increases rhythmically from cranial to caudal. This phenomenon superimposes a metameric pattern on the blastema. Furthermore, cell formations are shaped by the orientation of the mesenchymal cells. The name 'formationes quasi distensae' is proposed for this system. The anlage of the atlas shows a distinct mesenchymal anlage of a vertebral body. The conclusion is drawn that the dens axis is predominantly formed out of the anlage of the atlas body. The opinion that man does not show an anlage of the atlas body can no longer be sustained.
对一名人类胚胎（头臀长9毫米，卡内基分期16期）的颈椎柱原基进行了研究。轴旁间充质中的核密度从颅侧向尾侧有节律地增加。这种现象在芽基上叠加了一种分节模式。此外，细胞形成受间充质细胞取向的影响。为此系统提出了“准扩张性结构”这一名称。寰椎原基显示出明显的椎体间充质原基。得出的结论是，齿突主要由寰椎体原基形成。认为人类不存在寰椎体原基的观点再也站不住脚了。
