[Serotonergic systems of the biliary tract, stomach and duodenum in the norm and at the experimental stomach ulcer].

Stimulation of the sympathetic trunk against the background of the vagus nerve irritation was shown to cause the enhancement of the electromotor activity of the gallbladder, Oddi's sphincter, stomach and duodenum blocked by ganglionary and peripheral serotonin blockers. A lateral-medial gradient of the serotonergic innervation of the biliary tract was revealed. The gastro- and duodenoprotective action of the 5-HT 1,2-serotonin blocker was established at the experimental stomach ulcer.