Dai R X, Sun Y A
Sci Sin B. 1982 Nov;25(11):1179-85.
The spontaneous potentials (SPs) of nerveless embryonic epithelium of Cynops orientalis were observed by conventional intracellular micro-electrode technique. The amplitude and frequency of SPs of epithelial cells and the course of initiation and decline were recorded. The SPs can occur repeatedly at the stages when the embryonic epithelium is able to conduct excitation. The SP is very similar to the evoked propagatable potential, but has shorter duration. The amplitudes and frequencies of SPs differ in the different embryos and in different epithelial cells in the same embryo. The excitable epithelial cells of the embryo may lose their conductivity when the SPs come to a stable phase both in amplitude and frequency. And the conductivity can recover again after the subsiding of SPs. The SPs can be eliminated by tetrodotoxin (TTX), but they are not affected by the treatment of cobalt chloride.
采用传统的细胞内微电极技术观察了东方蝾螈无神经胚胎上皮的自发电位。记录了上皮细胞自发电位的幅度和频率以及起始和衰减过程。在胚胎上皮能够传导兴奋的阶段，自发电位可反复出现。自发电位与诱发的可传播电位非常相似，但持续时间较短。不同胚胎以及同一胚胎的不同上皮细胞的自发电位幅度和频率有所不同。当自发电位在幅度和频率上达到稳定阶段时，胚胎的可兴奋上皮细胞可能会失去其传导性。自发电位消退后，传导性又可恢复。河豚毒素（TTX）可消除自发电位，但氯化钴处理对其无影响。
