Abstract：
The somatosensory system detects peripheral stimuli that are translated into behaviors necessary for survival. Fishes and amphibians possess two somatosensory systems in the trunk: the primary somatosensory system, formed by the Rohon-Beard neurons, and the secondary somatosensory system, formed by the neural crest cell-derived neurons of the Dorsal Root Ganglia. Rohon-Beard neurons have been characterized as a transient population that mostly disappears during the first days of life and is functionally replaced by the Dorsal Root Ganglia. Here, I follow Rohon-Beard neurons in vivo and show that the entire repertoire remains present in zebrafish from 1-day post-fertilization until the juvenile stage, 15-days post-fertilization. These data indicate that zebrafish retain two complete somatosensory systems until at least a developmental stage when the animals display complex behavioral repertoires.
摘要：
体感系统检测周围刺激，这些刺激被转化为生存所必需的行为。鱼类和两栖动物在躯干中拥有两个体感系统：主要的体感系统，由Rohon-Beard神经元形成，和次级体感系统，由背根神经节的神经c细胞衍生的神经元形成。Rohon-Beard神经元的特征是短暂的种群，在生命的最初几天大部分消失，并在功能上被背根神经节取代。这里,我在体内跟踪Rohon-Beard神经元，并表明从受精后1天到幼年阶段，斑马鱼中仍然存在整个库，受精后15天。这些数据表明，斑马鱼保留了两个完整的体感系统，直到至少一个发育阶段，此时动物表现出复杂的行为特征。
