Roberts A, Patton D T
J Neurosci Res. 1985;13(1-2):23-38. doi: 10.1002/jnr.490130103.
We have examined the primary growth of neurites by Rohon-Beard sensory neurones in embryos of Xenopus, Rana, and Ambystoma. Using transmission electron microscopy we have confirmed that some central longitudinal neurites first grow directly under the basal lamina which surrounds the spinal cord in Xenopus embryos. Using scanning electron microscopy of dissected embryos we have followed the growth of neurites from the spinal cord to their target tissue, the skin. Comparisons between the three genera are made and detailed observations on growth cones during fasciculation, on the somites and on the basal lamina of the skin are presented. The observations are discussed in relation to possible influences on the course of growth of the developing neurites.
我们研究了非洲爪蟾、林蛙和蝾螈胚胎中罗霍恩－比尔兹利感觉神经元的神经突初级生长情况。利用透射电子显微镜，我们证实，在非洲爪蟾胚胎中，一些中央纵向神经突最初直接在围绕脊髓的基膜下生长。通过对解剖胚胎的扫描电子显微镜观察，我们追踪了神经突从脊髓到其靶组织——皮肤的生长过程。我们对这三个属进行了比较，并展示了对成束过程中的生长锥、体节以及皮肤基膜的详细观察结果。我们结合对发育中神经突生长过程可能产生的影响来讨论这些观察结果。
