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Sphincter - Wikipedia, the free encyclopedia
A sphincter is a structure, usually a circular muscle, that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Th...
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Urethral sphincter - Wikipedia, the free encyclopedia
The urethral sphincter is a collective name for the muscles used to control the flow of urine (micturition) from the urinary bladder. These muscles envelop the urethra, so that when they contract, t...
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Swallowing problems include disturbances of the brain, oral or pharynx muscle dysfunction, loss of sphincter muscle relaxation, and esophageal narrowing. Learn how to recognize the warning signs and treatment of swallowing problems on MedicineNet.com. ... Loss of sphincter muscle relaxation (termed "achalasia").
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Definition of internal sphincter muscle of anus from the online medical dictionary hosted by mondofacto. ... internal sphincter muscle of anus -->; internal anal sphincter...
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Normally, during bladder filling (continence) and expulsion (micturition) there is a reciprocity between the pattern of activity in the urinary bladder sacral parasympathetic efferents and the somatic motoneurones innervating the striated external urethral sphincter muscle. ... The Medscape Journal ... Allergy & Clinical Immunology...
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Non-Fiction Usage: Sphincter Muscle ... Severe or chronic prolapse requires surgery to strengthen and tighten the anal sphincter muscle or to repair the prolapsed lining. (references) ... A different muscle, the sphincter muscle, is supposed to hold urine in by squeezing the urethra shut at the opening of the bladder. (references)
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