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The urethral sphincter is considered an integral part of maintaining urinary continence, and it is important to understand its role in some conditions: Stress urinary incontinence is a common problem related to the function of the urethral sphincter. Weak pelvic floor muscles, intrinsic sphincter damage, or damage to the surrounding nerves and ...
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.
Stress incontinence, also known as effort incontinence, is essentially due to incomplete closure of the urinary sphincter, due to problems in the sphincter itself or insufficient strength of the pelvic floor muscles supporting it. This type of incontinence is when urine leaks during activities that increase intra-abdominal pressure, such as ...
Urinary retention is a relatively uncommon presentation in young women. Fowler's syndrome primarily presents in women between menarche and menopause. The peak age of onset is 26 yrs. [5] It is seen in about one third of the women who experience urinary retention. The predominant complaint is the inability to urinate for a day or more with no ...
That applies to those who may not be able to fight infections as well, including older people who may also experience a reduced capacity to urinate normally since aging can be accompanied by ...
The internal urethral sphincter is a urethral sphincter muscle which constricts the internal urethral orifice. It is located at the junction of the urethra with the urinary bladder and is continuous with the detrusor muscle , [ 1 ] [ 2 ] but anatomically and functionally fully independent from it. [ 3 ]
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 ...
Bladder sphincter dyssynergia (also known as detrusor sphincter dyssynergia (DSD) (the ICS standard terminology agreed 1998) [1] and neurogenic detrusor overactivity (NDO)) is a consequence of a neurological pathology such as spinal injury [2] or multiple sclerosis [3] which disrupts central nervous system regulation of the micturition (urination) reflex resulting in dyscoordination of the ...