[Processes facilitating conduction in the vesical plexus of the cat]

In the cat isolated bladder plexus, cholinergic transmission from parasympathetic "entry" was shown to be less obvious at low-frequency stimulation and much more effective (up to 300-1800%) at a high-frequency one (1-20/sec). During posttetanic potentiation (up to 5 min) it is possible to reach the 100% saturation of ganglion motor pool. The phenomena of facilitation were shown to be conducted through presynaptic mechanisms. The facilitation processes are more obvious in the bladder plexus than in sympathetic ganglia and allow to filtrate low and amplify high frequencies of activation which is particularly significant during urine storage and evacuation.