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The female or male external sphincter muscle of urethra (sphincter urethrae): located in the deep perineal pouch, at the bladder's distal inferior end in females, and inferior to the prostate (at the level of the membranous urethra) in males. It is a secondary sphincter to control the flow of urine through the urethra.
The muscle helps maintain continence of urine along with the internal urethral sphincter which is under control of the autonomic nervous system.The external sphincter muscle prevents urine leakage as the muscle is tonically contracted via somatic fibers that originate in Onuf's nucleus and pass through sacral spinal nerves S2-S4 then the pudendal nerve to synapse on the muscle.
The external urethral sphincter is a striated muscle that allows voluntary control over urination. [5] The internal sphincter, formed by the involuntary smooth muscles lining the bladder neck and urethra, receives its nerve supply by the sympathetic division of the autonomic nervous system. [6] The internal sphincter is present both in males ...
Many men can also benefit from physical therapy for their pelvic muscles. Also called pelvic floor muscle training, these exercises might help: Improve urinary incontinence
AMS 800 and ZSI 375 artificial urinary sphincters. The artificial urinary sphincter is an implantable device used to treat stress incontinence, mostly in men. The device is made of 2 or 3 parts: The pump, cuff, and balloon reservoir connected to each other by specialized tubes.
The amount of urine passed during each urination is relatively small. [1] Pain while urinating suggests that there is a problem other than overactive bladder. [1] Specific treatment is not always required. [1] If treatment is desired pelvic floor exercises, bladder training, and other behavioral methods are initially recommended. [3]
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