The interaction of electrical activity among neurons of lobster cardiac ganglion.
The interaction of electrical activity among neurons of lobster cardiac ganglion.
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龙虾心脏神经节神经元之间电活动的相互作用。
DOI：
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发表时间：
1958
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影响因子：
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通讯作者：
Akira Watanabe
中科院分区：
文献类型：
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作者：
Akira Watanabe
1.借助于细胞内微电极记录龙虾心神经节单个大细胞的电位变化。特别注意细胞之间的相互作用，并使用双光束示波器，从两个不同的细胞进行同时记录。“跟随者”类型的电位是最常见的，与Hagiwara和布洛克（10）以及布洛克和Terzuolo（7）描述的美国龙虾神经节细胞中获得的电位相似。两个相邻细胞的突触电位密切同步。这似乎表明存在共同的突触前纤维。另一方面，叠加尖峰并不总是同步的.当向细胞膜施加内向电流时，尖峰的产生通常会被阻止。另一方面，突触电位的幅值增加.施加到细胞膜上的外向电流引起去极化。在足够的强度下，在去极化上叠加产生一个尖峰或一系列尖峰。电紧张电位引起的施加电流，不仅在其中插入电流电极的细胞，而且在相邻的细胞中，其中没有插入电流电极，具有降低的幅度和延迟的时间过程。这种现象被认为是大细胞之间存在“电连接”。在一些标本中，当小细胞用0.1%普鲁卡因-海水麻醉时，在一个大细胞中产生缓慢的振荡电位变化，其具有高达10 mV的可变幅度和约每秒一次的频率，并叠加有尖峰或一系列尖峰。8.慢振荡电位出现在相邻细胞中，具有一定的相移和降低的幅度。这种现象被解释为一种电紧张性扩散，这是由细胞之间的电连接所实现的。
1. The potential changes were recorded from the individual large cells of the lobster cardiac ganglion with the aid of intra-cellular microelectrodes. Special attention was paid to the interaction among the cells, and, using a dual beam oscilloscope, simultaneous recording was made from two different cells.2. The “follower” type of potential was the most common and similar to that obtained in ganglion cells of an American lobster, described by Hagiwara and Bullock (10), and Bullock and Terzuolo (7).3. The synaptic potentials in two adjacent cells were closely synchronized. This seems to indicate existence of common presynaptic fibers. On the other hand the superimposed spikes were not always synchronized.4. With an inward current applied to the cell membrane, the spike generation was often blocked. On the other hand, however, the synaptic potentials were increased in amplitude.5. An outward current applied to the cell membrane caused a depolarization. With sufficient strength a spike or a series of spikes was produced superimposed on the depolarization.6. Electrotonic potentials were elicited by an applied current, not only in the cell in which the current electrode was inserted, but also in a neighboring cell in which no current electrode was inserted, with a reduced amplitude and a delayed time course. This phenomenon was regarded as existence of “electrical connections” among large cells.7. In some specimens when the small cells were anaesthetized with 0.1% procain-sea water, a slow oscillatory potential change was produced in one of the large cells, which has variable amplitude of up to 10 mV and frequency of about one per second, and was superimposed with a spike or a series of spikes. 8. The slow oscillatory potentials appeared in a neighboring cell with a certain phase shift and a reduced amplitude. This phenomenon was explained as a sort of electrotonic spread which is made possible by the electrical connection among cells.