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Experiment done in an isolated buccal ganglion showing that B44 and B51 are electrically coupled. Current injections are indicated by horizontal bars. When B51 is depolarized (A), it is more effective at driving B44 than vice versa (B). In part this is attributable to the fact that B51 is further from threshold when it is at its resting membrane potential. Consequently, when B51 is activated by injecting current, there is an underlying DC component to evoked activity (arrow in A).
