Spontaneous Activity of the Detrusor Muscle in the Cat

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Abstract
A study on the spontaneous activity of the detrusor muscle in the cat, using the bladder of a single animal during a series of 7 periods, revealed that all regions of the urinary bladder exhibit spontaneous activity. In the small or slightly distended bladder this activity is irregular and uncoordinated, while in bladders which are moderately to well distended, there is usually a nodal point of activity in the proximal region which initiates a peristaltic wave of contraction which passes to the more distal regions. This was true also in micturition.