[Mechanism of stimulation of the motor activity of the stomach by the greater splanchnic nerve].

The activating effect of the splanchnic nerve on motor activity of the gastro-intestinal tract could not be eliminated either with bilateral vagotomy or separate or joint administration of ornid and benzohexonium, but could be well prevented with atropin blockade of the vegetative ganglia M-serotoninergic receptors as well as diprazin blockade of the smooth muscle D-serotoninergic receptors. The data obtained reveal non-cholinergic and non-adrenergic fibers in the thoracic portion of the major splanchnic nerve which exert obvious activating effect on the stomach contractile function, serotonin being their transmitter.