van Mier P, ten Donkelaar H J
Department of Anatomy and Embryology, University of Nijmegen, The Netherlands.
Neurosci Lett. 1988 Jan 11;84(1):35-40. doi: 10.1016/0304-3940(88)90333-3.
The development of dorsal root ganglia (DRG) and the primary afferent system of the hindlimb was studied during metamorphosis in Xenopus laevis larvae. The first DRG cells appeared at stage 40 and at stage 48 the first primary afferent fibers entered the lumbar spinal cord where they bifurcated into ascending and descending branches. Primary afferent fibers and the dendrites of the secondary motoneurons contacted first in a lateral (state 56) and later (stage 58) in a dorsomedial terminal field. Reflexogenic hindlimb behaviour at stage 56 concurred with the presence of the lateral terminal field and many unipolar dorsal root ganglion cells.
在非洲爪蟾幼体变态发育过程中，研究了背根神经节（DRG）和后肢初级传入系统的发育情况。第一批DRG细胞出现在第40阶段，在第48阶段，第一批初级传入纤维进入腰脊髓，在那里它们分成升支和降支。初级传入纤维与次级运动神经元的树突首先在外侧（状态56）接触，随后（第58阶段）在内侧背侧终末场接触。第56阶段的反射性后肢行为与外侧终末场和许多单极背根神经节细胞的存在相一致。
