Computer analysis of the electromyogram of the external urethral sphincter

摘要

AbstractThe electromyograms of canine external urethral sphincter were recorded and analyzed with a microcomputer (Nihon Koden Co., ATAC 450).There was no observable change in the electromyographic activity of the external urethral sphincter in response to an α‐blocker (phentolamine) or a β‐blocker (propanolol). However, there was complete abolition of electromyographic activity following the administration of neuromuscular blocking agents (suxamethonium or pancuronium).The opinions that the α‐adrenerpic system acts predominantly on the external urethral sphincter via the pudendal nerve cannot be supported by the data obtained in th