[Adrenergic mechanisms of the cystic plexus in the cat]

Hypogastric and pelvic nerves were stimulated in experiments carried out on isolated vesical plexuses of the cat as well as intra-or extracellular recording of the activity of vesical ganglion neurons was conducted. Characteristics of evoked responses, ganglionic lability, rhythmic and posttetanic potentiation were studied. Homosynaptic presynaptic origin of posttetanic potentiation was noted. Suppression of ganglionic recording in stimulation of sympathetic fibres and in intraarterial injections of catecholamines is suggested to be connected with presynaptic adrenergic inhibition. This suggestion was confirmed in experiments with administration of reserpine and phenoxybenzidine .