Evolution of nerve development in frogs. I. The development of the peripheral nervous system in Discoglossus pictus (Discoglossidae).
Evolution of nerve development in frogs. I. The development of the peripheral nervous system in Discoglossus pictus (Discoglossidae).
复制标题
青蛙神经发育的进化。
DOI：
10.1159/000113323
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Roth,G
中科院分区：
文献类型：
--
作者：
Schlosser,G;Roth,G
通过神经和肌肉的免疫组织化学染色，研究了花斑盘舌蛙（Discoglossus pictusis）胚胎发生和变态过程中外周神经系统（PNS）的大体解剖学发育。在头部，在尾芽阶段，神经突生长开始于三叉神经的下颌支。颅肌在胚胎中期开始分化时就受到神经支配。在胚胎晚期，三叉神经和面神经的行程变得非常扭曲，并在伴随着颌骨肌肉重组的变态期间再次发生急剧变化。两个枕体节和神经发育短暂，但在胚胎晚期退化。舌下神经由第一和第二脊神经融合而发育，并在胚胎阶段接受第三和第四脊神经的短暂贡献。在躯干中，几类Rohon-Beard神经突可以在胚胎阶段被识别，其中一种形成了节间感觉神经，预示了后期脊神经感觉支的过程。我们给出了PNS和颅肌发育的详细时间表，并与配套论文中描述的其他青蛙物种的数据进行了比较，这将作为评估青蛙PNS发育进化过程中异时性变化的基础。
The gross anatomical development of the peripheral nervous system (PNS) during embryogenesis and metamorphosis in the frogDiscoglossus pictusis described based on whole-mount immunostaining for nerves and muscles. In the head, neurite outgrowth starts with the mandibular ramus of the trigeminal nerve at the tailbud stage. Cranial muscles are innervated as soon as they differentiate, beginning at mid-embryonic stages. During late embryonic stages, the course of the trigeminal and facial nerves becomes greatly distorted and changes again drastically during metamorphosis accompanying the reorganization of the jaw muscles. Two occipital somites and nerves develop transitorily but degenerate at late embryonic stages. The hypoglossal nerve develops by fusion of the first and second spinal nerves and receives a transitory contribution of the third and fourth spinal nerve at embryonic stages. In the trunk, several classes of Rohon-Beard neurites could be identified at embryonic stages, one of which forms intersegmental sensory nerves that prefigure the course of the sensory rami of spinal nerves at later stages. We give detailed schedules of PNS and cranial muscle de-velopment which, in comparison with data on other frog species described in a companion paper, will serve as a basis to evaluate heterochronic shifts during evolution of PNS development in frogs.