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首页> 外文期刊>Zoological Science >Coordinated peripheral neuronal activities among the different regions of the digestive tract in aplysia
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Coordinated peripheral neuronal activities among the different regions of the digestive tract in aplysia

机译：海床消化道不同区域之间周围神经元活动的协调

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Peripheral neuronal somata are scattered throughout the enteric nervous system (ENS) in Aplysia. We found that somata on the outer surface of the digestive tract were more densely distributed on the stomatogastric ring and the posterior gizzard than on other regions. In preparations with or without the central nervous system, two types of synchronous bursting activity were recorded from the nerves of the ENS. Some of the synchronous bursts were recorded from nerves on the crop and stomatogastric ring, whereas others were recorded from nerves on the crop, stomatogastric ring, and gizzard. Experiments using preparations in which the different regions were separated suggested that the former bursts originated in neurons on the crop and the latter originated in neurons on the gizzard. Axonal projections of neurons on the different regions were examined by backfilling and analysis of the direction of impulse conduction. Blocking chemical synapses in separated gizzards depressed EPSP-like potentials and eliminated the bursting activities. When chemical synapses on the crop and stomatogastric ring but not on the gizzard were blocked in a whole digestive tract preparation, bursting activity recorded from nerves on all the regions was decreased, although the frequency of the bursting rhythm did not change. Stimulation of a neuron on the crop elicited bursts in nerves on the gizzard. These results suggest that chemical synaptic connections and a feedback loop along the digestive tract coordinate the synchrony of bursting activity originating in the gizzard.
机译：周围神经元的躯体散布在海兔的整个肠神经系统（ENS）中。我们发现，消化道外表面上的躯体比其他区域更密集地分布在胃胃环和后g上。在有或没有中枢神经系统的制剂中，从ENS的神经中记录到两种类型的同步爆发活动。某些同步爆发是从作物和气孔胃环的神经记录的，而其他同步爆发是从作物，气孔胃环和胃的神经记录的。使用将不同区域分开的制剂进行的实验表明，前者的爆发起源于农作物的神经元，后者的起源于in的神经元。通过回填和分析脉冲传导的方向来检查神经元在不同区域的轴突投影。在分离的g中阻断化学突触可抑制EPSP样电位并消除爆发活性。当在整个消化道中阻断作物和气胃环上的化学突触而不是胃izz上的化学突触被阻断时，尽管爆发节律的频率没有改变，但在所有区域神经记录的爆发活动却降低了。作物上神经元的刺激引起g神经破裂。这些结果表明，化学突触连接和沿着消化道的反馈回路协调了源自the的爆发活动的同步。

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