Figure 5. Response of nodose ganglia neurons to intraduodenal infusion of maltose.

A, the neurons responded to maltose after a latency of 10 s. Activity was maintained for the duration of the stimulus and ceased after rinsing the lumen with isotonic saline. B, administration of the CCK-8 antagonist CR-1409 had no effect on the nodose neuronal response to maltose (unit 15). C, administration of the 5-HT₃ receptor antagonist granisetron abolished the nodose neuronal response evoked by maltose (unit 36).