Department of Physiology, St. Marianna University School of Medicine, 2095 Sugao, Miyamae-ku, Kawasaki, 213 Japan.
Proc Natl Acad Sci U S A. 1986 Jun;83(11):4063-6. doi: 10.1073/pnas.83.11.4063.
Intracellular recordings were made simultaneously from pairs of neighboring bipolar cells by advancing two independent microelectrodes into retinas of carp (Cyprinus carpio). Bipolar cells were identified by their response properties and in several samples were verified by intracellular injection of Lucifer yellow. Current of either polarity injected into one member of the bipolar cell pair elicited a signconserving, sustained potential change in the other bipolar cell without any significant delay. This electrical coupling was reciprocal, and it was observed between cell types similar in function and in morphology. Our results strongly suggest that there is a spatial summation of signals at the level of bipolar cells, which makes central receptive field areas much larger than their dendritic fields.
通过将两个独立的微电极推进鲤鱼（Cyprinus carpio）的视网膜中，同时从一对相邻的双极细胞中进行细胞内记录。通过其反应特性识别双极细胞，并且在几个样本中通过 Lucifer yellow 的细胞内注射进行了验证。将任一极性的电流注入双极细胞对的一个成员中，会在另一个双极细胞中引起无明显延迟的保持信号的持续电位变化。这种电耦合是相互的，并且在功能和形态相似的细胞类型之间观察到。我们的结果强烈表明，在双极细胞水平上存在信号的空间总和，这使得中枢感受野区域比其树突场大得多。
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